A297940 Number of nX5 0..1 arrays with every element equal to 0, 2, 3 or 5 king-move adjacent elements, with upper left element zero.

1, 31, 16, 74, 330, 1032, 3640, 12800, 44663, 159995, 572956, 2043261, 7307313, 26155457, 93498812, 334546709, 1197214499, 4283674305, 15329787213, 54860589339, 196324599730, 702596664568, 2514424594382, 8998511519872

Offset

1,2

Comments

Column 5 of A297943.

Links

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

Example

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

Crossrefs

Cf. A297943.

Sequence in context: A040933 A033351 A240910 * A298551 A066434 A040932

Adjacent sequences: A297937 A297938 A297939 * A297941 A297942 A297943

Keyword

nonn

Author

R. H. Hardin, Jan 09 2018

Status

approved