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 A384857 #13 Jun 11 2025 10:11:25 %S A384857 1,1,7,46,361,-6284,-632951,-31583474,-1484748191,-51928436312, %T A384857 -303653774159,219248741052826,35743757192135425,4097960104621191004, %U A384857 408462300514973323753,33384541884258873033406,1521231207001104466842049,-200132739000502301652035888,-84772475888572203988197350303 %N A384857 E.g.f. A(x) satisfies A(x) = exp( x/A(-x*A(x)^3)^3 ). %F A384857 See A384861. %o A384857 (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, 3*j))); %Y A384857 Column k=1 of A384861. %Y A384857 Cf. A052752, A213112, A213113, A384855, A384856, A384858. %Y A384857 Cf. A213109. %K A384857 sign %O A384857 0,3 %A A384857 _Seiichi Manyama_, Jun 10 2025