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 A354403 #9 Jul 18 2022 19:14:40 %S A354403 1,15,171,2799,46933,831358,15085844,279317154,5247744254 %N A354403 Number of one-sided pseudo-polytans with n cells. %C A354403 As A354380, but with mirror-image figures counted as distinct. %Y A354403 Cf. A354380, A006074, A151519. %K A354403 nonn,hard,more %O A354403 1,2 %A A354403 _Aaron N. Siegel_, May 25 2022