An ascending sequence of primes a(n) such that either the sum of decimal digits of a(n) is divisible by the sum of decimal digits of a(n+1) or vice versa.
2, 11, 13, 17, 31, 53, 71, 79, 97, 101, 103, 107, 211, 233, 251, 277, 349, 367, 431
2 seqfan posts
Mon Jul 5 14:33:07 CEST 2010 [seqfan] Re: Primes with digits sum 2^k, A068807 and A178796