Numbers n of k digits such n^2 == 1 (mod 10^k).
1, 9, 49, 51, 99, 249, 251, 499, 501, 749, 751, 999, 1249, 3751, 4999, 5001, 6249
5 seqfan posts
Thu Nov 4 07:02:41 CET 2010 [seqfan] Re: correcting A181539
Wed Nov 3 15:44:23 CET 2010 [seqfan] Re: correcting A181539
Wed Nov 3 14:47:07 CET 2010 [seqfan] Re: correcting A181539
Wed Nov 3 14:47:07 CET 2010 [seqfan] Re: correcting A181539
Wed Nov 3 13:29:25 CET 2010 [seqfan] correcting A181539
Index of A-numbers in seqfan: by ascending order
by month
by frequency
by keyword
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