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A068207 Numbers n such that the number of divisors of n^2-1 equals the number of divisors of n. +0
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2, 6, 40, 54, 66, 70, 78, 80, 88, 110, 114, 128, 130, 182, 216, 222, 238, 250, 258, 276, 310, 318, 354, 366, 384, 402, 410, 418, 438, 456, 488, 498, 552, 594, 598, 616, 624, 632, 654, 678, 680, 682, 696, 726, 760, 762, 774, 786, 808, 830, 870, 906, 924, 928 (list; graph; listen)
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Last modified November 27 14:50 EST 2009. Contains 167570 sequences.


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