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 A303055 #61 Jan 30 2020 21:29:18
%S A303055 1,-42,-9702,-3124044,-1148086170,-453264419916,-187198205425308,
%T A303055 -79746435511181208,-34749509273997211386,-15405615778138763714460,
%U A303055 -6923283730695560413278324,-3145688371456037358687733032,-1442298118312593128958325595172
%N A303055 Expansion of (1-504*x)^(1/12).
%H A303055 Seiichi Manyama, <a href="/A303055/b303055.txt">Table of n, a(n) for n = 0..371</a>
%F A303055 a(n) = 42^n/n! * Product_{k=0..n-1} (12*k - 1) for n > 0.
%F A303055 a(n) ~ -504^n / (12 * Gamma(11/12) * n^(13/12)). - _Vaclav Kotesovec_, Jun 16 2018
%F A303055 D-finite with recurrence: n*a(n) +42*(-12*n+13)*a(n-1)=0. - _R. J. Mathar_, Jan 20 2020
%o A303055 (PARI) N=20; x='x+O('x^N); Vec((1-504*x)^(1/12))
%Y A303055 Cf. A109817.
%K A303055 sign,easy
%O A303055 0,2
%A A303055 _Seiichi Manyama_, Jun 15 2018