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A302640 Number of 7Xn 0..1 arrays with every element equal to 0, 1, 3 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero. 1
64, 86, 189, 657, 2303, 8981, 30216, 112431, 408512, 1512824, 5441957, 20021696, 73157743, 268090840, 977883198, 3582780118, 13103336584, 47949599697, 175342870194, 641714970276, 2347546538523, 8589020632731, 31421666502319 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 7 of A302635.

LINKS

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

EXAMPLE

Some solutions for n=5

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

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

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

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

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

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

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

CROSSREFS

Cf. A302635.

Sequence in context: A008435 A223083 A302169 * A302432 A303202 A302315

Adjacent sequences:  A302637 A302638 A302639 * A302641 A302642 A302643

KEYWORD

nonn

AUTHOR

R. H. Hardin, Apr 10 2018

STATUS

approved

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Last modified January 19 20:12 EST 2019. Contains 319310 sequences. (Running on oeis4.)