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 A014171 #9 Jul 08 2025 02:54:03 %S A014171 1,5,16,41,92,190,372,703,1298,2361,4255,7628,13638,24357,43496,77704, %T A014171 138899,248450,444678,796314,1426644,2556825,4583600,8218728,14739136, %U A014171 26435727,47418602,85061737,152594941 %N A014171 Apply partial sum operator 4 times to binary rooted tree numbers. %H A014171 <a href="/index/Ro#rooted">Index entries for sequences related to rooted trees</a> %F A014171 G.f.: (B(x)-x)/x(1-x)^4 where B(x) is g.f. of A002572. %Y A014171 Cf. A002572. %K A014171 nonn %O A014171 1,2 %A A014171 _N. J. A. Sloane_