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 A286871 Number of irredundant sets in the n X n king graph. 3
 2, 5, 43, 647, 22049, 1455385, 218691097, 72877697369, 51489351108548, 76986419992442614, 244445556617038272066, 1683765308911934025295376 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Table of n, a(n) for n=1..12. Eric Weisstein's World of Mathematics, Irredundant Set Eric Weisstein's World of Mathematics, King Graph MATHEMATICA A286870 = Import["https://oeis.org/A286870/b286870.txt", "Table"][[All, 2]]; a[n_] := A286870[[2 n^2 - 2 n + 1]]; Table[a[n], {n, 1, 9}] (* Jean-François Alcover, Sep 23 2019 *) CROSSREFS Main diagonal of A286870. Cf. A075550, A075709. Sequence in context: A273398 A116297 A215170 * A027730 A225724 A333734 Adjacent sequences: A286868 A286869 A286870 * A286872 A286873 A286874 KEYWORD nonn,more AUTHOR Andrew Howroyd, Aug 02 2017 EXTENSIONS a(10)-a(12) from Christian Sievers, Nov 22 2023 STATUS approved

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Last modified February 26 10:13 EST 2024. Contains 370343 sequences. (Running on oeis4.)