A301326 Number of nX4 0..1 arrays with every element equal to 0, 2, 3, 5 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

1, 10, 18, 45, 143, 414, 1481, 5062, 17879, 62112, 217402, 764860, 2687915, 9462966, 33320851, 117384939, 413427418, 1456413781, 5131048829, 18077067261, 63688856231, 224392218311, 790594491334, 2785479832548, 9814065517891

Offset

1,2

Comments

Column 4 of A301330.

Links

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

Example

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

Crossrefs

Cf. A301330.

Sequence in context: A007938 A007937 A300601 * A350317 A255603 A291931

Adjacent sequences: A301323 A301324 A301325 * A301327 A301328 A301329

Keyword

nonn

Author

R. H. Hardin, Mar 18 2018

Status

approved