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 A363586 #28 Jun 26 2023 02:07:11
%S A363586 2,10,120,3284,199724,26680618,7782067930,4936744315756
%N A363586 a(n) is the number of mappings X:{{1..n} choose 3}->{+,-} such that X(a,b,c) = X(b,c,d) implies X(a,b,c) = X(a,b,d) = X(a,c,d) = X(b,c,d) for a < b < c < d.
%H A363586 M. Balko, <a href="https://doi.org/10.1016/j.jcta.2018.11.013">Ramsey numbers and monotone colorings</a>, Journal of Combinatorial Theory, Series A, Volume 163 (2019), 34-58.
%K A363586 nonn,more
%O A363586 3,1
%A A363586 _Manfred Scheucher_, Jun 13 2023
%E A363586 a(9)-a(10) from _Bert Dobbelaere_, Jun 26 2023