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 A086896 #7 Jan 27 2020 18:49:09
%S A086896 1,5,4585,54253051,2369751675473,275554721637802801,
%T A086896 70273067330330423607145,34532185286124210261237875495,
%U A086896 29802657189336638372743189077264481,42132612521708992400294404621323425841373,92411987000615635571109725778868157237084881001
%N A086896 a(n) = (1/4!)*(A000522(4*n) + 6*A000522(2*n) + 8*A000522(n) + 9).
%H A086896 Andrew Howroyd, <a href="/A086896/b086896.txt">Table of n, a(n) for n = 0..100</a>
%o A086896 (PARI) \\ here b(n) is A000522.
%o A086896 b(n)={sum(k=0, n, binomial(n, k)*k!)}
%o A086896 a(n)={(b(4*n) + 6*b(2*n) + 8*b(n) + 9) / 24} \\ _Andrew Howroyd_, Jan 27 2020
%Y A086896 Cf. A000522, A008290.
%K A086896 nonn
%O A086896 0,2
%A A086896 _Vladeta Jovovic_, Aug 22 2003
%E A086896 Terms a(9) and beyond from _Andrew Howroyd_, Jan 27 2020