A305012 Number of nX5 0..1 arrays with every element unequal to 1, 2, 4, 5 or 7 king-move adjacent elements, with upper left element zero.

3, 51, 99, 255, 2715, 9499, 30457, 225009, 1046863, 4428355, 25786862, 133489800, 644632918, 3500846702, 18523401621, 94736004178, 504816486286, 2678501833047, 14004203659303, 74284132555049, 393952194673461, 2076786525949422

Offset

1,1

Comments

Column 5 of A305015.

Links

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

Example

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

Crossrefs

Cf. A305015.

Sequence in context: A316452 A227069 A062216 * A316173 A316645 A116630

Adjacent sequences: A305009 A305010 A305011 * A305013 A305014 A305015

Keyword

nonn

Author

R. H. Hardin, May 23 2018

Status

approved