A297985 Number of nX7 0..1 arrays with every element equal to 0, 2, 3 or 6 king-move adjacent elements, with upper left element zero.

1, 94, 21, 79, 105, 242, 444, 935, 1835, 3921, 8793, 19694, 44948, 102048, 235955, 545484, 1264620, 2932659, 6807942, 15840667, 36867513, 85882218, 200113634, 466535260, 1088021475, 2538033638, 5921858545, 13819429210, 32254710106

Offset

1,2

Comments

Column 7 of A297986.

Links

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

Example

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

Crossrefs

Cf. A297986.

Sequence in context: A263517 A299827 A146551 * A298634 A033414 A218053

Adjacent sequences: A297982 A297983 A297984 * A297986 A297987 A297988

Keyword

nonn

Author

R. H. Hardin, Jan 10 2018

Status

approved