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 A186419 #14 Jan 13 2025 16:27:11
%S A186419 1,8,432,40000,4802000,672126336,104133351168,17341997916672,
%T A186419 3048398071290000,558804401233936000,105925743088302215936,
%U A186419 20636658594095770856448,4113235881503101575668992,835806107659613266400000000,172665358079973774114240000000
%N A186419 a(n) = binomial(2*n,n)^4/(n + 1).
%F A186419 G.f.: 4F3({1/2,1/2,1/2,1/2},{1,1,2},256x), where 4F3 is a hypergeometric series.
%t A186419 Table[Binomial[2n,n]^4/(n+1),{n,0,40}]
%o A186419 (Maxima) makelist(binomial(2*n,n)^4/(n+1),n,0,12);
%Y A186419 Cf. A000108, A002894, A000888, A002897, A186414, A186415, A186416, A186418.
%K A186419 easy,nonn
%O A186419 0,2
%A A186419 _Emanuele Munarini_, Feb 21 2011