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 A231369 #7 Nov 11 2013 12:22:13 %S A231369 1,4,5,6,7,8,10,11,12,13,14,15,16,17,18,19,22,23,24,25,26,27,28,29,30, %T A231369 31,33,34,35,36,38,39,40,41,42,43,44,45,46,47,48,49,51,52,53,55,56,57, %U A231369 58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75 %N A231369 Numbers n such that antisigma(x) = n has no solution, where antisigma(m) = A024816(m) = the sum of the nondivisors of m that are between 1 and m. %C A231369 Complement of A231368. %C A231369 Numbers n such that A231367(n) = A231366(n) = 0. %Y A231369 Cf.: A007369 (numbers n such that sigma(x) = n has no solution), A024816, A231365, A231366, A231367, A231368. %K A231369 nonn %O A231369 1,2 %A A231369 _Jaroslav Krizek_, Nov 09 2013