A298962 Number of nX7 0..1 arrays with every element equal to 3, 5, 6, 7 or 8 king-move adjacent elements, with upper left element zero.

0, 8, 8, 75, 230, 1144, 4263, 18517, 75262, 317141, 1307739, 5446889, 22584896, 93917334, 389965508, 1620245230, 6729536166, 27956779018, 116131464818, 482427395426, 2004019363266, 8324893628475, 34582253578090, 143657911533546

Offset

1,2

Comments

Column 7 of A298963.

Links

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

Example

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

Crossrefs

Cf. A298963.

Sequence in context: A272961 A117861 A186984 * A082798 A286068 A228071

Adjacent sequences: A298959 A298960 A298961 * A298963 A298964 A298965

Keyword

nonn

Author

R. H. Hardin, Jan 30 2018

Status

approved