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 A000822 #16 Feb 01 2022 01:19:29 %S A000822 0,1,2,11,40,361,1952,24611,177280,2873041,25866752,512343611, %T A000822 5535262720,129570724921,1633165156352,44110959165011,635421069967360, %U A000822 19450718635716001,315212388819402752,10784052561125704811 %N A000822 Expansion of (sin^2 x + sin x) /cos 2x. %H A000822 R. J. Mathar, <a href="/A000822/b000822.txt">Table of n, a(n) for n = 0..177</a> %Y A000822 Bisections are A000464 and A000816. %K A000822 nonn %O A000822 0,3 %A A000822 _N. J. A. Sloane_