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 A172260 #12 Jun 22 2022 01:48:08 %S A172260 10,20,30,36,48,60,68,78,84,96,114,128,138,144,152,162,172,186,198, %T A172260 204,212,222,240,258,268,276,288,300,308,320,336,354,372,384,390,396 %N A172260 a(n) = A172240(n) + A172240(n+1). %C A172260 For a(n) > 10, a(n) is divisible by 6 except if A172240(n+1) - A172240(n) is equal to 6. %Y A172260 Cf. A172240. %K A172260 nonn,easy %O A172260 1,1 %A A172260 _Giovanni Teofilatto_, Nov 20 2010