Numbers n such that sigma_2(n)*sigma_1(n)/sigma_0(n) is a perfect square.
1, 4, 529, 2116, 2583, 3249, 3346, 6150, 10332, 12474, 12792, 12996, 28224, 38240
6 seqfan posts
Wed Aug 25 16:28:33 CEST 2010 [seqfan] Re: unable to reproduce A152218 (sigma divisibility)
Wed Aug 25 16:28:33 CEST 2010 [seqfan] Re: unable to reproduce A152218 (sigma divisibility)
Wed Aug 25 00:53:30 CEST 2010 [seqfan] Re: unable to reproduce A152218 (sigma divisibility)
Wed Aug 25 00:49:26 CEST 2010 [seqfan] Re: unable to reproduce A152218 (sigma divisibility)
Wed Aug 25 00:49:26 CEST 2010 [seqfan] Re: unable to reproduce A152218 (sigma divisibility)
Wed Aug 25 00:40:19 CEST 2010 [seqfan] unable to reproduce A152218 (sigma divisibility)
Index of A-numbers in seqfan: by ascending order
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