A302328 Number of 7Xn 0..1 arrays with every element equal to 0, 1, 2 or 4 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

64, 2785, 18093, 96956, 659949, 5542827, 45861206, 349722102, 2638308693, 20632095349, 164488042149, 1300817850933, 10197522707272, 80099391561538, 632617365948810, 5003985236582103, 39530523959312891, 312110835328722115

Offset

1,1

Comments

Row 7 of A302322.

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

Crossrefs

Cf. A302322.

Sequence in context: A302628 A302420 A303187 * A303021 A302825 A303518

Adjacent sequences: A302325 A302326 A302327 * A302329 A302330 A302331

Keyword

nonn

Author

R. H. Hardin, Apr 05 2018

Status

approved