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 A014169 #9 Jul 08 2025 02:53:56 %S A014169 1,4,11,25,51,98,182,331,595,1063,1894,3373,6010,10719,19139,34208, %T A014169 61195,109551,196228,351636,630330,1130181,2026775,3635128,6520408, %U A014169 11696591,20982875,37643135,67533204 %N A014169 Apply partial sum operator thrice to binary rooted tree numbers. %H A014169 <a href="/index/Ro#rooted">Index entries for sequences related to rooted trees</a> %F A014169 G.f.: (B(x)-x)/x(1-x)^3 where B(x) is g.f. of A002572. %Y A014169 Cf. A002572. %K A014169 nonn %O A014169 1,2 %A A014169 _N. J. A. Sloane_