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 A326999 #4 Aug 12 2019 13:54:56 %S A326999 1,1,36,6306,3156336,3501788976,7425169747776,27322211071838736, %T A326999 163058737794666253056,1500955605765318574331136, %U A326999 20488125782700503099836056576,401537703770887804145153979250176,10992280532048388256580758224034983936,410332411533091221236570416481170032685056 %N A326999 a(n) = A327000(4, n) + A291975(n). %F A326999 a(n) = A309522(4, n) - A327001(4, n) + A291975(n). %Y A326999 Cf. A327000, A309522, A327001, A291975. %K A326999 nonn %O A326999 0,3 %A A326999 _Peter Luschny_, Aug 12 2019