A304476 Number of nX5 0..1 arrays with every element unequal to 0, 1, 2, 4 or 6 king-move adjacent elements, with upper left element zero.

16, 64, 94, 297, 931, 2870, 8058, 25040, 76568, 231646, 698547, 2127306, 6445956, 19552446, 59312328, 179989186, 545864508, 1655917962, 5023513454, 15239822168, 46229536379, 140240525936, 425432765173, 1290586351293, 3915080833618

Offset

1,1

Comments

Column 5 of A304479.

Links

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

Example

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

Crossrefs

Cf. A304479.

Sequence in context: A305242 A039370 A324880 * A129588 A043193 A043973

Adjacent sequences: A304473 A304474 A304475 * A304477 A304478 A304479

Keyword

nonn

Author

R. H. Hardin, May 13 2018

Status

approved