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 A249332 #23 Sep 08 2022 08:46:10
%S A249332 1,18,1810,263844,44916498,8345319268,1640651321764,335556407724360,
%T A249332 70666388112940818,15220552520052960516,3337324864503769353060,
%U A249332 742446552655157791828680,167167472732516775004539300,38021985442071415426063237704,8723111727436784830252513497928
%N A249332 a(n) = Sum_{k=0..2*n} binomial(2*n, k)^4.
%H A249332 G. C. Greubel, <a href="/A249332/b249332.txt">Table of n, a(n) for n = 0..100</a>
%F A249332 a(n) = A005260(2*n).
%t A249332 Table[Sum[Binomial[2*n, k]^4, {k, 0, 2*n}], {n, 0, 30}] (* _G. C. Greubel_, Aug 04 2018 *)
%o A249332 (PARI) {a(n) = sum(k=0, 2*n, binomial( 2*n, k)^4)};
%o A249332 (Magma) [(&+[Binomial(2*n,k)^4: k in [0..2*n]]): n in [0..30]]; // _G. C. Greubel_, Aug 04 2018
%Y A249332 Cf. A001448, A005260, A006480, A050984.
%K A249332 nonn
%O A249332 0,2
%A A249332 _Michael Somos_, Oct 25 2014