A298587 Number of nX6 0..1 arrays with every element equal to 0, 3, 4, 5 or 7 king-move adjacent elements, with upper left element zero.

1, 9, 31, 31, 233, 1112, 4620, 29589, 169601, 1004366, 6170528, 37097303, 226884023, 1384096579, 8423128709, 51431654299, 313700623628, 1913231218064, 11674556253410, 71220090528854, 434503086638439, 2650996753675544

Offset

1,2

Comments

Column 6 of A298589.

Links

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

Example

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

Crossrefs

Cf. A298589.

Sequence in context: A300643 A161684 A294404 * A054310 A072887 A329651

Adjacent sequences: A298584 A298585 A298586 * A298588 A298589 A298590

Keyword

nonn

Author

R. H. Hardin, Jan 22 2018

Status

approved