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 A303515 Number of 4Xn 0..1 arrays with every element equal to 0, 1, 2, 4, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero. 1
 8, 81, 420, 1596, 7951, 43448, 222205, 1111647, 5678762, 29269343, 150041512, 767385774, 3932021861, 20164462418, 103363694493, 529734973779, 2715304606630, 13919219193295, 71350445359330, 365738495870594 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Row 4 of A303513. LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 R. H. Hardin, Empirical recurrence of order 63 FORMULA Empirical recurrence of order 63 (see link above) EXAMPLE Some solutions for n=5 ..0..1..1..0..0. .0..1..1..1..0. .0..1..0..1..0. .0..0..0..1..1 ..1..0..0..0..1. .0..0..0..0..0. .0..1..0..1..1. .0..1..0..1..0 ..1..0..1..0..1. .0..1..0..1..1. .0..0..1..0..0. .0..0..0..1..1 ..0..0..1..0..0. .0..0..0..0..1. .0..1..0..1..0. .1..1..1..0..0 CROSSREFS Cf. A303513. Sequence in context: A303018 A247536 A302822 * A027768 A236749 A343274 Adjacent sequences:  A303512 A303513 A303514 * A303516 A303517 A303518 KEYWORD nonn AUTHOR R. H. Hardin, Apr 25 2018 STATUS approved

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Last modified December 8 17:01 EST 2021. Contains 349596 sequences. (Running on oeis4.)