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 A301956 Number of 7Xn 0..1 arrays with every element equal to 1, 2 or 3 horizontally or antidiagonally adjacent elements, with upper left element zero. 1
 0, 233, 5820, 439078, 21418808, 1427656268, 86143630040, 5308792667591, 324469928188515, 19912146679826809, 1220249427475855637, 74810226305531953416, 4585754748793488994754, 281114995706301373466905 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Row 7 of A301951. LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 EXAMPLE Some solutions for n=5 ..0..0..0..0..0. .0..0..0..0..0. .0..0..0..0..0. .0..0..0..0..0 ..0..0..0..0..0. .0..0..0..0..0. .0..1..0..0..0. .0..0..0..0..0 ..1..1..1..0..0. .1..1..1..0..0. .1..0..1..0..0. .1..1..1..1..0 ..0..0..1..1..1. .1..1..0..0..0. .0..1..0..0..0. .0..0..0..0..0 ..1..1..0..0..1. .1..0..1..1..0. .1..1..1..1..1. .0..1..1..1..1 ..1..0..1..1..1. .0..0..0..0..0. .1..1..0..1..1. .1..0..1..0..1 ..0..0..0..0..0. .0..0..1..1..1. .1..0..1..1..1. .0..1..0..1..1 CROSSREFS Cf. A301951. Sequence in context: A250464 A221812 A219065 * A220567 A201035 A189454 Adjacent sequences: A301953 A301954 A301955 * A301957 A301958 A301959 KEYWORD nonn AUTHOR R. H. Hardin, Mar 29 2018 STATUS approved

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Last modified October 3 14:07 EDT 2023. Contains 365866 sequences. (Running on oeis4.)