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 A130018 #9 Sep 21 2024 02:27:06
%S A130018 1,1,1,2,4,9,22,56,152,428,1257,3827,12023,38975,129801,443833,
%T A130018 1554849,5572334,20409121,76283610,290737945,1128730320,4460079331,
%U A130018 17924115817,73207479057,303691230784,1278796858227,5462983288161,23664467118878,103895077228910
%N A130018 Eigensequence of A053121.
%F A130018 a(n) = Sum_{k=0..n-1} A053121(n-1,k)*a(k) for n>0 with a(0)=1.
%Y A130018 Cf. A053121.
%K A130018 nonn
%O A130018 0,4
%A A130018 _Philippe Deléham_, Jun 16 2007
%E A130018 More terms from _Jason Yuen_, Sep 20 2024