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A317763 Number of nX7 0..1 arrays with every element unequal to 0, 1 or 2 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero. 1
64, 190, 196, 232, 302, 425, 639, 1012, 1663, 2801, 4792, 8278, 14385, 25088, 43852, 76756, 134466, 235697, 413288, 724863, 1271539, 2230756, 3913889, 6867349, 12050002, 21144516, 37103735, 65109496, 114255232, 200498730, 351843854 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 7 of A317764.

LINKS

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

FORMULA

Empirical: a(n) = 3*a(n-1) -2*a(n-2) -a(n-4) +a(n-5) -a(n-6) +a(n-7) for n>11

EXAMPLE

Some solutions for n=5

..0..1..1..1..1..0..0. .0..0..0..1..0..0..0. .0..0..0..0..1..1..1

..1..1..1..1..0..0..0. .0..0..1..1..0..0..0. .0..0..0..1..1..1..1

..1..1..1..0..0..0..0. .0..1..1..1..0..0..0. .0..0..1..1..1..1..0

..1..1..0..0..0..0..1. .1..1..1..1..0..0..1. .0..1..1..1..1..0..0

..1..0..0..0..0..1..1. .1..1..1..1..0..1..1. .1..1..1..1..0..0..0

CROSSREFS

Cf. A317764.

Sequence in context: A203448 A078093 A209371 * A318342 A318074 A202332

Adjacent sequences:  A317760 A317761 A317762 * A317764 A317765 A317766

KEYWORD

nonn

AUTHOR

R. H. Hardin, Aug 06 2018

STATUS

approved

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Last modified January 19 06:18 EST 2022. Contains 350464 sequences. (Running on oeis4.)