A297906 Number of n X 7 0..1 arrays with every element equal to 0, 1, 3 or 4 king-move adjacent elements, with upper left element zero.

21, 203, 20, 466, 2353, 1586, 23911, 117161, 369290, 3815083, 22352269, 133622612, 1094086797, 7257658041, 50479207435, 380579362922, 2653381878723, 19060249633810, 139787845467370, 993619765856273, 7181175650570587

Offset

1,1

Comments

Column 7 of A297907.

Links

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

Example

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

Crossrefs

Cf. A297907.

Sequence in context: A341399 A125384 A126542 * A298500 A298319 A299392

Adjacent sequences: A297903 A297904 A297905 * A297907 A297908 A297909

Keyword

nonn

Author

R. H. Hardin, Jan 08 2018

Status

approved