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 A304927 Number of n X n 0..1 arrays with every element unequal to 0, 1, 3, 5 or 7 king-move adjacent elements, with upper left element zero. 0
 1, 5, 13, 73, 452, 2653, 15993, 118024, 920997, 12184613, 162877680, 2507024025, 36984184204, 682363665419 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Diagonal of A304931. LINKS Table of n, a(n) for n=1..14. EXAMPLE Some solutions for n=5 ..0..0..1..0..0. .0..1..1..1..1. .0..0..0..0..0. .0..1..1..1..1 ..0..0..0..0..0. .1..1..1..1..1. .1..0..0..0..0. .1..1..1..1..0 ..0..0..0..0..0. .1..1..1..1..0. .0..0..0..0..0. .1..1..1..1..1 ..0..0..0..0..1. .1..1..1..0..0. .0..0..0..0..0. .0..1..1..1..1 ..1..0..0..0..0. .1..1..0..0..0. .1..0..0..0..1. .0..0..1..1..1 CROSSREFS Cf. A304931. Sequence in context: A137702 A140120 A303962 * A163732 A208821 A293259 Adjacent sequences: A304924 A304925 A304926 * A304928 A304929 A304930 KEYWORD nonn AUTHOR R. H. Hardin, May 21 2018 STATUS approved

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Last modified June 16 19:52 EDT 2024. Contains 373432 sequences. (Running on oeis4.)