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 A355295 #37 Jun 28 2022 10:58:46 %S A355295 1,4,17,92,495,2475,11771,52226,212527,789228,2640323,7870055, %T A355295 20730606,47916748,96715832,170154214,260956703,349541944,410294786, %U A355295 423631649,385887175,310724581,221398196,139580751,77748102,38162987,16445627,6178002,2007607,559163,131269,25378,4012,481,36,4 %N A355295 Number of distinct board states reachable in n jumps in European Peg Solitaire. %H A355295 Sander G. Huisman, <a href="/A355295/a355295.m.txt">Mathematica program for this sequence</a> %e A355295 The beginning state is missing the peg just above the center, as an initial state with the center peg removed does not yield any valid solutions where 1 peg is remaining. %e A355295 * * * %e A355295 * * * * * %e A355295 * * * O * * * %e A355295 * * * * * * * %e A355295 * * * * * * * %e A355295 * * * * * %e A355295 * * * %e A355295 The next move yields the next 4 states: %e A355295 * * * * * * * O * * * * %e A355295 * * * * * * * * * * * * O * * * * * * * %e A355295 * O O * * * * * * * * * * * * * * * * * * * * * * O O * %e A355295 * * * * * * * * * * O * * * * * * * * * * * * * * * * * %e A355295 * * * * * * * * * * O * * * * * * * * * * * * * * * * * %e A355295 * * * * * * * * * * * * * * * * * * * * %e A355295 * * * * * * * * * * * * %Y A355295 Cf. A335656, A351286, A112737, A130515, A350561. %K A355295 nonn,fini,full %O A355295 0,2 %A A355295 _Sander G. Huisman_, Jun 27 2022