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 A331768 #21 Jul 29 2023 03:26:48
%S A331768 480,4800,16800,40320,79200,137280,218400,326400,465120,638400,850080,
%T A331768 1104000,1404000,1753920,2157600,2618880,3141600,3729600,4386720,
%U A331768 5116800,5923680,6811200,7783200,8843520,9996000,11244480,12592800,14044800,15604320,17275200,19061280,20966400,22994400
%N A331768 El Gradechi's hybrid coefficients alpha^{4,4}_{2n}.
%C A331768 See El Gradechi (2013) page 426 for precise definition.
%H A331768 Robin Visser, <a href="/A331768/b331768.txt">Table of n, a(n) for n = 0..10000</a>
%H A331768 Amine M. El Gradechi, <a href="https://doi.org/10.1007/s11139-012-9415-5">The Lie theory of certain modular form and arithmetic identities</a>, The Ramanujan Journal 31.3 (2013): 397-433.
%F A331768 a(n) = 480 * binomial(3 + 2*n, 3) = 480 * A000447(n+1). - _Robin Visser_, Jul 24 2023
%o A331768 (Magma) [480*Binomial(3 + 2*n, 3) : n in [0..100]]; // _Robin Visser_, Jul 24 2023
%o A331768 (PARI) a(n) = 480*binomial(3 + 2*n, 3); \\ _Robin Visser_, Jul 24 2023
%Y A331768 Cf. A000447, A331769, A331770.
%K A331768 nonn
%O A331768 0,1
%A A331768 _N. J. A. Sloane_, Feb 08 2020
%E A331768 More terms from _Robin Visser_, Jul 24 2023