Those positive integers that occur at least once as a sum of any two distinct terms of sequence A164921.
1, 2, 3, 5, 6, 7, 11, 12, 13, 16, 17, 18, 19, 22, 23, 24, 25, 28, 29, 30, 31, 34, 37, 38, 39
2 seqfan posts
Mon Aug 31 22:22:41 CEST 2009 [seqfan] Re: Coprime To Sums