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 A303672 #11 Apr 29 2018 13:00:20
%S A303672 1,-2,-8,-60,-600,-7152,-96456,-1430544,-22933920,-393013280,
%T A303672 -7144207808,-137001926144,-2760226854816,-58242464679360,
%U A303672 -1283886660610560,-29506641823939200,-705788634473952000,-17544801385483584000,-452659831142363014400
%N A303672 a(n) = [x^n] (5040 / Sum_{k=0..n} (k+7)!*x^k)^(1/4).
%H A303672 Seiichi Manyama, <a href="/A303672/b303672.txt">Table of n, a(n) for n = 0..444</a>
%p A303672 [seq(coeff(series((factorial(7)/add(factorial(k+7)*x^k,k=0..n))^(1/4), x,30),x,n),n=0..25)]; # _Muniru A Asiru_, Apr 29 2018
%o A303672 (PARI) N=66; x='x+O('x^N); Vec((7!/sum(k=0, N, (k+7)!*x^k))^(1/4))
%Y A303672 Cf. A077607, A303671, A303673.
%K A303672 sign
%O A303672 0,2
%A A303672 _Seiichi Manyama_, Apr 28 2018