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 A352180 #3 Mar 08 2022 15:09:49 %S A352180 1,10,28,91,298,982,3241,10702,35344,116731,385534,1273330,4205521, %T A352180 13889890,45875188,151515451,500421538,1652780062,5458761721, %U A352180 18029065222,59545957384,196666937371,649546769494,2145307245850,7085468507041 %N A352180 a(n) = 9*A006190(n)+1. %D A352180 L.-N. Machaut, Query 3436, L'Intermédiaire des Mathématiciens, 16 (1909), 62-63. %Y A352180 Cf. A006190. %K A352180 nonn %O A352180 0,2 %A A352180 _N. J. A. Sloane_, Mar 08 2022