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 A379858 #22 Jan 06 2025 04:19:47 %S A379858 1,0,1,-10,157,-3136,77509,-2288896,78824953,-3105906688,137925180361, %T A379858 -6818997285376,371578940493589,-22130352562929664, %U A379858 1430368670554859533,-99722125119137591296,7459992570265962997489,-596072767690463855509504,50666927756525446827810961 %N A379858 E.g.f. A(x) satisfies A(x) = exp(-x*A(x)^3) + x. %F A379858 a(n) = n! * Sum_{k=0..n} (-3*n+4*k-1)^(n-k) * binomial(3*n-3*k+1,k)/( (3*n-3*k+1)*(n-k)! ). %o A379858 (PARI) a(n) = n!*sum(k=0, n, (-3*n+4*k-1)^(n-k)*binomial(3*n-3*k+1, k)/((3*n-3*k+1)*(n-k)!)); %Y A379858 Cf. A379871, A379910, A379911. %Y A379858 Cf. A379856, A379875. %K A379858 sign %O A379858 0,4 %A A379858 _Seiichi Manyama_, Jan 05 2025