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 A226753 #8 Jun 17 2013 12:54:42 %S A226753 52,56,2199,17312,92444,31768040,41159079,52236776,79563436,683321810, %T A226753 689969123,757808252,881421986,910016369,22184779055 %N A226753 Numbers n such that sigma(n) + sigma(n+1) + sigma(n+2) = sigma(n+3) + sigma(n+4) + sigma(n+5). %C A226753 The sequence of corresponding sums begins: 272, 290, 10820, 86514, 473568, 162349956, 203060920, 258797664, 398693936, 3418531584, 3544794576, 3812186016, 4066082208, 4374966816. %e A226753 Sigma(52) + sigma(53) + sigma(54) = 98 + 54 + 120 = 272. %e A226753 Sigma(55) + sigma(56) + sigma(57) = 72 + 120 + 80 = 272. %e A226753 So 52 is in the sequence. %Y A226753 Cf. A000203, A055574, A065900, A073500, A099632, A226361, A226475. %K A226753 nonn,more %O A226753 1,1 %A A226753 _Alex Ratushnyak_, Jun 16 2013 %E A226753 a(15) from _Giovanni Resta_, Jun 17 2013