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 A112133 #11 Dec 14 2023 05:33:07 %S A112133 1,11,13,11,1,23,1,11,13,11,1,23,1,11,13,11,1,23,1,11,13,11,1,23,1,11, %T A112133 13,11,1,23,1,11,13,11,1,23,1,11,13,11,1,23,1,11,13,11,1,23,1,11,13, %U A112133 11,1,23,1,11,13,11,1,23,1,11,13,11,1,23,1,11,13,11,1,23,1,11,13,11,1 %N A112133 First differences of A112063. %H A112133 <a href="/index/Rec#order_04">Index entries for linear recurrences with constant coefficients</a>, signature (-1,0,1,1). %Y A112133 Period=6. Also half of the first differences of A112073. Cf. A112086. %K A112133 nonn,easy %O A112133 1,2 %A A112133 _Antti Karttunen_, Aug 28 2005