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 A274690 #16 Aug 12 2016 06:22:18 %S A274690 -2,3,4,5,-3,7,-5,9,-6,12,-4,-7,16,-8,17,-10,-9,18,-11,23,-13,24,-12, %T A274690 -14,28,-15,-16,26,-17,31,-18,-20,33,-21,36,-22,40,-19,-24,42,-23,-25, %U A274690 43,-26,44,-27,-29,45,-28,47,-30,-31,52,-32,53,-34,-33,62,-35,-37 %N A274690 First differences of A274689. %C A274690 It appears that this sequence and its partial sums plus one list every integer except zero. %Y A274690 Cf. A030124, A274689. %K A274690 sign %O A274690 1,1 %A A274690 _Max Barrentine_, Jul 02 2016