A298887 Number of nX7 0..1 arrays with every element equal to 1, 2, 4, 6 or 8 king-move adjacent elements, with upper left element zero.

8, 95, 63, 240, 444, 814, 1818, 3663, 7496, 16544, 33596, 70466, 148451, 311053, 653252, 1372584, 2873709, 6036087, 12668750, 26606071, 55876191, 117364939, 246515244, 517702247, 1087644299, 2284968402, 4799996646, 10083584000

Offset

1,1

Comments

Column 7 of A298888.

Links

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

Example

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

Crossrefs

Cf. A298888.

Sequence in context: A297857 A298092 A298054 * A298659 A299611 A099298

Adjacent sequences: A298884 A298885 A298886 * A298888 A298889 A298890

Keyword

nonn

Author

R. H. Hardin, Jan 28 2018

Status

approved