Ruth-Aaron numbers (2): sum of prime divisors of n = sum of prime divisors of n+1 (both taken with multiplicity).
5, 8, 15, 77, 125, 714, 948, 1330, 1520, 1862, 2491, 3248, 4185, 4191, 5405, 5560
1 seqfan posts
Thu Dec 2 18:16:11 CET 2010 [seqfan] Re: Trotter Math