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 A286271 #13 Jun 25 2022 21:44:19
%S A286271 1,1,2,3,5,7,11,16,24,35,53,78,118,176,266,401,611,927,1419,2169,3333,
%T A286271 5124,7910,12215,18925,29345,45609,70959,110609,172576,269684,421829,
%U A286271 660647,1035602,1625122,2552322,4012282,6312136,9938336,15658610,24689060,38952138
%N A286271 a(0)=1; thereafter a(n) = Sum_{k=2..n+1} A006206(k).
%H A286271 Marston Conder, S. Du, R. Nedela, and M. Skoviera, <a href="https://doi.org/10.1007/s10801-016-0692-8">Regular maps with nilpotent automorphism group</a>, Journal of Algebraic Combinatorics, December 2016, Volume 44, Issue 4, pp 863-874; DOI: 10.1007/s10801-016-0692-8
%Y A286271 Cf. A006206, A286272.
%Y A286271 Partial sums of A060280.
%K A286271 nonn
%O A286271 0,3
%A A286271 _N. J. A. Sloane_, May 08 2017
%E A286271 Offset and definition corrected by _N. J. A. Sloane_, Jun 16 2021