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 A350468 #8 Feb 18 2024 03:32:03
%S A350468 1,1,15,29,239,645,3991,13021,68895,251189,1215719,4732365,21752431,
%T A350468 88005541,392539575,1624617149,7120171199,29864811285,129547208071,
%U A350468 547654566061,2361315479055,10028479403909,43086896110679,183485607765405,786702153314911,3355500662030581
%N A350468 a(n) = hypergeom([1/2 - n/2, -n/2], [-n], -56).
%F A350468 a(n) ~ (1 + sqrt(57))^(n+1) / (sqrt(57) * 2^(n+1)). - _Vaclav Kotesovec_, Feb 18 2024
%t A350468 Table[HypergeometricPFQ[{1/2 - n/2, -n/2}, {-n}, -56], {n, 0, 30}] (* _Vaclav Kotesovec_, Feb 18 2024 *)
%Y A350468 a(n) = A350470(7, n).
%K A350468 nonn
%O A350468 0,3
%A A350468 _Peter Luschny_, Mar 19 2022