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 A162479 #7 Jan 30 2020 21:29:16
%S A162479 1,3,17,105,671,4393,29249,197117,1340579,9182013,63247587,437684991,
%T A162479 3040564703,21191554941,148109893057,1037660903785,7285259590495,
%U A162479 51244141331581,361046057274899,2547558161041995,17999651555835001
%N A162479 Expansion of 1/((1-x)*sqrt(1-4x/(1-x)^4)).
%C A162479 Partial sums are A162480. Partial sums of A162478.
%F A162479 G.f.: 1/(1-x-2x/((1-x)^3-x/(1-x-x/((1-x)^3-x/(1-x-x/((1-x)^3-x/(1-... (continued fraction);
%F A162479 a(n)=sum{k=0..n, C(n+3k,n-k)*A000984(k)}.
%F A162479 Conjecture D-finite with recurrence: n*a(n) +3*(2-3n)*a(n-1) +2*(7n-13)*a(n-2)+2*(12-5n)*a(n-3) +(5n-16)*a(n-4) +(4-n)*a(n-5)=0. - _R. J. Mathar_, Nov 17 2011
%K A162479 easy,nonn
%O A162479 0,2
%A A162479 _Paul Barry_, Jul 04 2009