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 A300633 Number of nXn 0..1 arrays with every element equal to 1, 2, 4 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero. 0
 0, 2, 13, 97, 1130, 23097, 865205, 57365508, 7042663221, 1472367608349 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Diagonal of A300639. LINKS EXAMPLE Some solutions for n=5 ..0..0..0..0..0. .0..0..1..1..1. .0..0..1..0..1. .0..0..1..0..0 ..1..1..1..1..1. .1..1..0..0..0. .1..1..1..0..1. .1..1..1..1..1 ..0..0..0..0..1. .1..1..1..1..1. .1..0..0..1..0. .1..1..0..0..0 ..1..1..1..0..0. .1..1..1..1..0. .0..1..1..0..1. .1..1..1..1..0 ..0..0..1..1..0. .1..0..0..1..0. .0..0..0..1..1. .1..0..0..1..1 CROSSREFS Cf. A300639. Sequence in context: A320360 A074614 A184019 * A064325 A123619 A187746 Adjacent sequences:  A300630 A300631 A300632 * A300634 A300635 A300636 KEYWORD nonn AUTHOR R. H. Hardin, Mar 10 2018 STATUS approved

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Last modified February 22 16:40 EST 2019. Contains 320399 sequences. (Running on oeis4.)