This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A157847 #6 Aug 14 2012 09:19:47 %S A157847 5,11,17,23,25,29,41,43,46,47,50,53,58,59,67,71,73,77,83,85,86,89,92, %T A157847 94,95,101,103,107,109,113,116,118,125,131,134,137,145,146,149,151, %U A157847 163,167,170,172,173,178,179,181,185,188,191,193,197,202,206,209,214,215,218,219 %N A157847 Numbers which are not a mean of divisors of some arithmetic number A003601(k). %C A157847 Numbers not occurring in A102187. The complement to A157846. %H A157847 Zak Seidov, <a href="/A157847/b157847.txt">Table of n, a(n) for n = 1..1000</a> %Y A157847 Cf. A102187, A003601, A000203, A000005. %K A157847 nonn %O A157847 1,1 %A A157847 _Jaroslav Krizek_, Mar 07 2009 %E A157847 Edited and extended by _R. J. Mathar_, Mar 15 2009