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 A289893 #23 Feb 16 2025 08:33:49 %S A289893 1,3,3,2,23,18,6,270,166,28,4842,2532,244,120052,49620,2544,3852972, %T A289893 1270832,35600,156145080,40668960,659632,7746956424,1606984224, %U A289893 15106128,460265296128,75930070688,425802176 %N A289893 Number of maximum independent vertex sets in the n-triangular honeycomb queen graph. %H A289893 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/MaximumIndependentVertexSet.html">Maximum Independent Vertex Set</a> %F A289893 a(3*n+1) agrees with A002047(n) for available terms. %Y A289893 Cf. A002047, A350041, A350191, A004396 (independence number). %K A289893 nonn,more,hard %O A289893 1,2 %A A289893 _Eric W. Weisstein_, Jul 14 2017 %E A289893 a(18)-a(19) from _Vaclav Kotesovec_, Dec 13 2021 %E A289893 a(20) from _Vaclav Kotesovec_, Dec 16 2021 %E A289893 a(21)-a(28) from _Martin Ehrenstein_, Dec 17 2021