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 A295453 #6 Nov 28 2017 11:50:03 %S A295453 1,15015,951425475,70008087393552,5472752419793774115, %T A295453 442152818018970753425640,36471466447057357977530250960, %U A295453 3051670756860336385013412647728800,258020271506436677733823067896257122595,21990039069051148065537923218288162358113800 %N A295453 a(n) = (15*n)!*n!/((9*n)!*(5*n)!*(2*n)!). %F A295453 G.f.: hypergeom([1/15, 2/15, 4/15, 7/15, 8/15, 11/15, 13/15, 14/15], [1/9, 2/9, 4/9, 1/2, 5/9, 7/9, 8/9], 9765625/108*x). %Y A295453 Cf. A295431. %K A295453 nonn %O A295453 0,2 %A A295453 _Gheorghe Coserea_, Nov 27 2017