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 A133260 #9 Nov 22 2023 08:32:07 %S A133260 20,22,30,44,66,94 %N A133260 Unknown. %C A133260 Possible solution: a(1) = 20 and a(n) = a(n-1) + 2 * A078309(n-1) for n >=2 , giving 20, 22, 30, 44, 66, 94, 128, 170, 218, 272, 334, 402, 476, 558, 646, 740, 842, ... . - _Michal Paulovic_, Nov 05 2023 %Y A133260 Cf. A078309. %K A133260 nonn,unkn %O A133260 1,1 %A A133260 kidon (kidonoscar(AT)hotmail.com), Oct 15 2007