A295377 Number of nX6 0..1 arrays with each 1 horizontally or vertically adjacent to 0, 2 or 4 1s.

21, 299, 4071, 55643, 761795, 10437240, 142860055, 1956512289, 26790134422, 366852068404, 5023461594972, 68788552129955, 941953214288271, 12898594994181355, 176626393130327608, 2418626153744793468

Offset

1,1

Comments

Column 6 of A295379.

Links

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

Example

Some solutions for n=4
..0..0..0..0..0..0. .0..0..0..1..0..0. .1..0..0..0..0..0. .0..1..0..1..1..0
..0..0..0..0..0..0. .0..0..0..0..0..0. .0..0..1..0..0..0. .1..0..1..1..1..0
..0..0..1..0..0..1. .1..0..1..0..1..0. .0..0..0..0..0..0. .0..0..1..1..0..0
..0..1..0..0..1..0. .0..1..0..1..0..1. .0..0..0..0..0..0. .0..0..0..0..1..0

Crossrefs

Cf. A295379.

Sequence in context: A019943 A021634 A295049 * A021604 A025935 A077506

Adjacent sequences: A295374 A295375 A295376 * A295378 A295379 A295380

Keyword

nonn

Author

R. H. Hardin, Nov 21 2017

Status

approved