A303021 Number of 7Xn 0..1 arrays with every element equal to 0, 1, 2, 4 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

64, 2785, 22652, 123538, 1044810, 11644063, 121524556, 1219773362, 12840308325, 138188869767, 1487261602685, 16048324478816, 174329388978329, 1901869591830415, 20795916418331529, 227842869036330196

Offset

1,1

Comments

Row 7 of A303016.

Links

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

Example

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

Crossrefs

Cf. A303016.

Sequence in context: A302420 A303187 A302328 * A302825 A303518 A240483

Adjacent sequences: A303018 A303019 A303020 * A303022 A303023 A303024

Keyword

nonn

Author

R. H. Hardin, Apr 17 2018

Status

approved