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 A291942 #9 Sep 06 2017 14:10:13 %S A291942 1,1,-2,5,-9,14,-24,47,-87,151,-272,505,-918,1656,-3020,5512,-10020, %T A291942 18221,-33172,60388,-109899,199992,-364002,662529,-1205777,2194488, %U A291942 -3994057,7269275,-13230124,24078998,-43824226,79760817,-145165804,264203948,-480855437,875164374 %N A291942 Row sums of A291940. %H A291942 Seiichi Manyama, <a href="/A291942/b291942.txt">Table of n, a(n) for n = 0..3841</a> %Y A291942 Cf. A291896, A291905, A291930. %K A291942 sign %O A291942 0,3 %A A291942 _Seiichi Manyama_, Sep 06 2017