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 A215929 #46 Aug 11 2021 04:37:46 %S A215929 0,2,24,240,196560 %N A215929 Terms of A002336 of the form (2^k - 2)*(2*k - 2) for some k. %Y A215929 Cf. A002336. %K A215929 nonn,more %O A215929 1,2 %A A215929 _Raphie Frank_, Aug 27 2012