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 A286869 #16 Feb 16 2025 08:33:45 %S A286869 2,11,113,4481,425926,116003176,84850904785,169727130490809, %T A286869 923777353698065520,13700760654444668547510 %N A286869 Number of irredundant sets in the grid graph P_n X P_n. %H A286869 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/GridGraph.html">Grid Graph</a> %H A286869 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/IrredundantSet.html">Irredundant Set</a> %Y A286869 Main diagonal of A286868. %Y A286869 Cf. A286871 (king graph). %K A286869 nonn,more %O A286869 1,1 %A A286869 _Andrew Howroyd_, Aug 02 2017 %E A286869 a(10) from _Christian Sievers_, Nov 23 2023