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 A030041 #7 Mar 18 2020 05:02:46
%S A030041 1,1,2,3,5,12,23,45,92,183,434,936,2012,4365,9551,20748,45065,108070,
%T A030041 245109,553308,1253492,2846553,6482338,14721344,33423804,75916943,
%U A030041 187505118,441004027,1032009219,2419549459,5676752449,13331861333,31398821908,73794930935
%N A030041 a(n+1) = Sum_{k=0..sqrt(n)} a(k) * a(n-k).
%o A030041 (PARI) lista(nn) = {my(v=vector(nn+2, i, 1)); for(n=0, nn, v[n+2]=sum(k=1, 1+sqrt(n), v[k]*v[n+2-k])); v; } \\ _Jinyuan Wang_, Mar 18 2020
%Y A030041 Cf. A000992.
%K A030041 nonn
%O A030041 0,3
%A A030041 _N. J. A. Sloane_
%E A030041 More terms from _Jinyuan Wang_, Mar 18 2020