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 A043315 #6 Feb 03 2014 12:13:19 %S A043315 1,2,3,4,5,6,7,8,9,10,121,123,124,125,126,127,128,129,130,131,242,243, %T A043315 245,246,247,248,249,250,251,252,363,364,365,367,368,369,370,371,372, %U A043315 373,484,485,486,487,489,490,491,492,493,494 %N A043315 a(n)=s(n)/12, where s=A033009. %o A043315 (PARI) is_A043315(n)=(n=[n])&&!until(!n[1],((n=divrem(n[1],121))[2]<11 && n[1]%11!=n[2])||return) \\ _M. F. Hasler_, Feb 03 2014 %Y A043315 Cf. A043307 - A043320, A043291, A033001 - A033014, A033016 - A033029. %K A043315 nonn,base %O A043315 1,2 %A A043315 _Clark Kimberling_