A298553 Number of nX7 0..1 arrays with every element equal to 0, 2, 3, 5 or 7 king-move adjacent elements, with upper left element zero.

1, 130, 104, 716, 3822, 17378, 85227, 430934, 2190786, 11366897, 58786296, 304409720, 1574646420, 8153955724, 42238326406, 218903973959, 1134752920484, 5883383818159, 30504617875042, 158171652762933, 820165722165942

Offset

1,2

Comments

Column 7 of A298554.

Links

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

Example

Some solutions for n=7
..0..0..1..1..0..0..0. .0..0..1..1..1..0..1. .0..1..0..0..0..1..1
..0..1..0..0..1..1..0. .1..0..1..1..1..0..0. .1..1..0..0..0..1..0
..0..1..0..1..1..1..0. .1..1..1..0..1..1..1. .0..0..0..1..0..0..0
..0..1..1..1..1..1..0. .0..0..1..1..1..0..1. .0..0..1..0..1..0..1
..0..1..0..0..1..1..0. .0..1..0..1..0..1..0. .1..1..0..1..1..0..0
..0..1..0..1..0..0..0. .0..1..1..0..1..0..0. .1..1..1..0..1..0..1
..0..0..1..1..0..1..0. .0..0..1..1..0..0..1. .1..1..1..0..0..1..1

Crossrefs

Cf. A298554.

Sequence in context: A113489 A375387 A297942 * A298726 A299560 A043604

Adjacent sequences: A298550 A298551 A298552 * A298554 A298555 A298556

Keyword

nonn

Author

R. H. Hardin, Jan 21 2018

Status

approved