A300379 Number of nX7 0..1 arrays with every element equal to 0, 2 or 3 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

1, 74, 131, 692, 6577, 53367, 481311, 4070089, 36505624, 319929622, 2837476138, 25246596055, 223898861023, 1988295398102, 17653104464628, 156742758122408, 1391761200734035, 12357651656612721, 109729025922860987

Offset

1,2

Comments

Column 7 of A300380.

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

Crossrefs

Cf. A300380.

Sequence in context: A118221 A333100 A270340 * A300681 A309143 A365201

Adjacent sequences: A300376 A300377 A300378 * A300380 A300381 A300382

Keyword

nonn

Author

R. H. Hardin, Mar 04 2018

Status

approved