A302819 Number of nX7 0..1 arrays with every element equal to 0, 1, 2, 4 or 5 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

64, 960, 7900, 170262, 3252934, 58122740, 1135257814, 22294687742, 427140472935, 8302040868397, 161951214852377, 3140738898721896, 61036498168516642, 1187741080719613728, 23082916011414934514, 448705985586604686474

Offset

1,1

Comments

Column 7 of A302820.

Links

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

Example

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

Crossrefs

Cf. A302820.

Sequence in context: A253133 A302321 A303015 * A303512 A000818 A220678

Adjacent sequences: A302816 A302817 A302818 * A302820 A302821 A302822

Keyword

nonn

Author

R. H. Hardin, Apr 13 2018

Status

approved