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 A384810 #12 Jun 10 2025 16:33:29 %S A384810 1,1,5,37,417,4761,33313,-1509339,-135791359,-8149132943, %T A384810 -455269648959,-24532196772291,-1260399381304511,-56411711489070807, %U A384810 -1357347436103060191,146282852689561868821,35003916010171558562817,5112183093788001812407521,647998390863196992450043777 %N A384810 E.g.f. A(x) satisfies A(x) = exp( x/A(-x*A(x)^3)^2 ). %F A384810 See A384813. %o A384810 (PARI) a(n, k=-1) = if(n*k==0, 0^n, (-1)^n*k*sum(j=1, n, (-3*n+3*j+k)^(j-1)*binomial(n, j)*a(n-j, 2*j))); %Y A384810 Column k=1 of A384813. %Y A384810 Cf. A052750, A213110, A213111, A384617, A384809. %K A384810 sign %O A384810 0,3 %A A384810 _Seiichi Manyama_, Jun 10 2025