A302683 Number of 5Xn 0..1 arrays with every element equal to 0, 1, 4 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

16, 9, 11, 33, 63, 187, 661, 1837, 5075, 15661, 46975, 135191, 398107, 1187251, 3492697, 10253381, 30301323, 89476359, 263483993, 776726391, 2291909243, 6757855265, 19921284797, 58748244533, 173250475905, 510831651353

Offset

1,1

Comments

Row 5 of A302680.

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Formula

Empirical: a(n) = a(n-1) +a(n-2) +10*a(n-3) +13*a(n-4) -7*a(n-6) -6*a(n-7) -11*a(n-8) -6*a(n-9) -4*a(n-10) -2*a(n-11) for n>16

Example

Some solutions for n=5
..0..1..0..1..0. .0..1..0..1..0. .0..1..0..1..0. .0..1..0..1..0
..0..1..1..1..0. .0..1..0..0..0. .0..1..0..1..0. .0..1..0..1..0
..0..1..0..1..0. .0..1..0..1..0. .0..1..0..1..0. .0..1..0..0..0
..0..1..0..1..0. .0..1..1..1..0. .0..1..0..1..0. .0..1..0..1..0
..0..0..0..1..0. .0..1..0..1..0. .0..1..0..0..0. .0..1..0..1..0

Crossrefs

Cf. A302680.

Sequence in context: A070579 A278829 A066905 * A302518 A070567 A257796

Adjacent sequences: A302680 A302681 A302682 * A302684 A302685 A302686

Keyword

nonn

Author

R. H. Hardin, Apr 11 2018

Status

approved