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数列:1
12
123
1234
12345
123456
1234567
12345678
123456789
求:该数列所有特征(越多越好)


1楼2013-08-06 19:26回复
    楼主先来:第N项有N个数


    2楼2013-08-06 19:26
    回复
      都有1


      来自Android客户端3楼2013-08-06 19:28
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        第N项最后一个数是N


        来自百度影音浏览器4楼2013-08-06 19:29
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          所有的数字都是阿拉伯数字对不对


          IP属地:江苏5楼2013-08-06 21:43
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            第n项有n位


            IP属地:上海6楼2013-08-06 21:51
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              被说完了


              7楼2013-08-06 22:50
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                第一行:1到2
                第n行:1到n+1
                    ------智商吧力争打造成最高水平最文明最有爱的吧!智吧有爱,生活+1!


                8楼2013-08-06 23:01
                回复
                  第n+1项=第n项x10+n+1


                  IP属地:四川来自Android客户端9楼2013-08-07 00:06
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                    目前看这是有限数列。


                    来自Android客户端10楼2013-08-07 06:47
                    回复
                      仅取前四项
                      1, 12, 123, 1234, 12345, 123456, 1234567, 12345678, 123456789, 12345678910, 1234567891011, 123456789101112, 12345678910111213, 1234567891011121314, 123456789101112131415, 12345678910111213141516, 1234567891011121314151617
                      0, 1, 12, 123, 1234, 12345, 123456, 1234567, 12345678, 123456789, 1234567900, 12345679011, 123456790122, 1234567901233, 12345679012344, 123456790123455, 1234567901234566, 12345679012345677
                      0, 1, 12, 123, 1234, 12345, 123456, 1234567, 12345679, 123456790, 1234567901, 12345679012, 123456790123, 1234567901234, 12345679012345, 123456790123456, 1234567901234567, 12345679012345679, 123456790123456790
                      0, 1, 12, 123, 1234, 12345, 123456, 1234567, 12345678, 123456789, 1234567890, 12345678901, 123456789012, 1234567890123, 12345678901234, 123456789012345, 1234567890123456, 12345678901234567, 123456789012345678
                      1, 12, 123, 1234, 12345, 123456, 1234567, 12345678, 123456789, 1023456789, 11023456789, 101123456789, 1011213456789, 10112131456789, 101121314156789, 1011213141516789, 10112131415161789, 101121314151617189
                      1, 12, 123, 1234, 12345, 123456, 1234567, 12345678, 123456789, 12345678901, 1234567890111, 123456789011121, 12345678901112131, 1234567890111213141, 123456789011121314151, 12345678901112131415161
                      1, 12, 123, 1234, 12345, 123456, 1234567, 12345678, 123456789, 10123456789, 1011123456789, 101111223456789, 10111121323456789, 1011112131423456789, 101111213141523456789, 10111121314151623456789
                      1, 12, 123, 1234, 14325, 143256, 1432567, 12347658, 123476589, 12347658910, 1234710985611, 123471098561112, 12347651211891013, 1234761310981112514, 123476131098111251415, 12347651211815149101316, 1234765121189101316151417, 123476589101316151417121118
                      1, 12, 123, 1234, 12345, 123457, 1234578, 12345789, 1234578910, 123457891011, 12345789101112, 1234578910111213, 123457891011121314, 12345789101112131415, 1234578910111213141516, 123457891011121314151617
                      1, 12, 123, 1234, 14325, 143256, 1234765, 12347658, 123476589, 10123476589
                      Thanks to OEIS


                      11楼2013-08-07 08:29
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