Numbers n such that there exists a solution to the equation 1 = 1/x_1 + ... + 1/x_k (for any k), 0
1, 6, 12, 15, 18, 20, 24, 28, 30, 33, 35, 36, 40, 42, 45, 48, 52, 54, 55, 56, 60, 63, 65
2 seqfan posts
Tue May 22 15:28:53 CEST 2012 [seqfan] Re: Integer sequence question at MathOverflow