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 A296820 Number of n X n 0..1 arrays with each 1 adjacent to 2, 3 or 4 king-move neighboring 1's. 0
 1, 6, 94, 2272, 510086, 267542809, 364592446431, 2034946979145210, 34966993876417278748 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Diagonal of A296827. LINKS EXAMPLE Some solutions for n=4 ..0..0..1..1. .1..1..0..0. .1..1..1..1. .0..0..0..0. .0..0..0..0 ..1..1..0..1. .0..1..0..0. .1..0..0..1. .0..0..0..0. .1..1..1..0 ..0..1..0..1. .0..1..0..0. .0..1..1..0. .1..1..1..0. .0..1..1..0 ..0..0..1..1. .1..1..1..0. .0..0..1..1. .0..1..0..0. .0..0..0..0 CROSSREFS Cf. A296827. Sequence in context: A221525 A321073 A198257 * A184983 A184980 A184981 Adjacent sequences:  A296817 A296818 A296819 * A296821 A296822 A296823 KEYWORD nonn AUTHOR R. H. Hardin, Dec 21 2017 STATUS approved

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Last modified January 26 13:18 EST 2021. Contains 340439 sequences. (Running on oeis4.)