A317868 Number of n X 5 0..1 arrays with every element unequal to 2, 3 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

0, 4, 4, 88, 220, 759, 3303, 11807, 45995, 161983, 600598, 2215104, 8089252, 30099028, 109674718, 406751671, 1486387672, 5496201882, 20148470577, 74325953662, 272963769305, 1005515372431, 3696468960096, 13607350428609

Offset

1,2

Comments

Column 5 of A317871.

Links

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

Example

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

Crossrefs

Cf. A317871.

Sequence in context: A222271 A068376 A131592 * A224092 A217188 A092209

Adjacent sequences: A317865 A317866 A317867 * A317869 A317870 A317871

Keyword

nonn

Author

R. H. Hardin, Aug 09 2018

Status

approved