A298885 Number of nX5 0..1 arrays with every element equal to 1, 2, 4, 6 or 8 king-move adjacent elements, with upper left element zero.

3, 23, 23, 73, 123, 243, 444, 897, 1801, 3462, 6669, 13291, 25762, 49483, 97860, 193033, 376031, 735990, 1440269, 2815283, 5522803, 10827092, 21196028, 41505035, 81298779, 159266998, 311969014, 611140770, 1197086348, 2345047342, 4593936013

Offset

1,1

Comments

Column 5 of A298888.

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..0..0..1..0. .0..0..0..1..0. .0..1..1..0..1
..0..1..1..1..0. .1..1..1..0..0. .1..1..1..1..0. .1..0..0..0..1
..0..1..1..1..0. .0..0..0..0..0. .0..1..1..1..0. .1..0..0..0..1
..1..1..1..1..1. .1..0..0..0..1. .0..1..1..1..1. .0..0..0..0..0
..0..0..0..1..1. .1..0..0..0..1. .1..0..0..1..1. .1..1..1..0..0
..1..1..1..1..0. .1..0..1..1..0. .0..0..1..1..0. .0..0..0..0..1
..0..0..0..1..0. .0..0..1..0..1. .1..1..0..1..0. .1..1..1..0..1

Crossrefs

Cf. A298888.

Sequence in context: A297855 A298090 A298052 * A298657 A299609 A238198

Adjacent sequences: A298882 A298883 A298884 * A298886 A298887 A298888

Keyword

nonn

Author

R. H. Hardin, Jan 28 2018

Status

approved