Odd composite squarefree numbers n such that r = 2*(d-2+n/d)/(d-1) is an integer for each prime divisor d of n.
15, 91, 435, 561, 703, 1105, 1729, 1891, 2465, 2701, 2821, 3367, 5551, 6601, 8695
4 seqfan posts
Sun Aug 22 09:07:41 CEST 2010 [seqfan] Re: A180248
Sat Aug 21 23:22:09 CEST 2010 [seqfan] Re: A180248
Sat Aug 21 22:42:23 CEST 2010 [seqfan] Re: A180248
Sat Aug 21 22:11:31 CEST 2010 [seqfan] A180248
Index of A-numbers in seqfan: by ascending order
by month
by frequency
by keyword
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