A303409 Number of nX7 0..1 arrays with every element equal to 1, 2, 4, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

8, 98, 730, 6322, 160247, 1716995, 24386918, 497878411, 6748940959, 106242067376, 1858501096856, 28169515094303, 452053058478307, 7483434704337764, 118104298097496073, 1903568189475537422, 30951192368001440803

Offset

1,1

Comments

Column 7 of A303410.

Links

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

Example

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

Crossrefs

Cf. A303410.

Sequence in context: A196327 A116130 A302527 * A264168 A116287 A290242

Adjacent sequences: A303406 A303407 A303408 * A303410 A303411 A303412

Keyword

nonn

Author

R. H. Hardin, Apr 23 2018

Status

approved