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%I #11 Oct 15 2021 14:59:26
%S 1,1,1,1,2,3,6,11,20,40,77,160,319,636,1332,2721,5799,12068,25109,
%T 53943,113682,245931,523896,1115239,2425858,5208339,11388934,24630843,
%U 53194684,116764483,253764437,559289434,1221970242,2666776056,5889628123,12910470041,28608337855
%N a(n+1) = Sum_{k=0..floor(2*n/5)} a(k) * a(n-k).
%H Seiichi Manyama, <a href="/A030037/b030037.txt">Table of n, a(n) for n = 0..1000</a>
%o (PARI) lista(nn) = {my(v=vector(nn+2, i, 1)); for(n=2, nn, v[n+2]=sum(k=1, 1+(2*n)\5, v[k]*v[n+2-k])); v; } \\ _Jinyuan Wang_, Mar 18 2020
%Y Cf. A000992, A030036, A030038, A030039.
%K nonn
%O 0,5
%A _N. J. A. Sloane_
%E More terms from _Jinyuan Wang_, Mar 18 2020
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