A302875 Number of nX6 0..1 arrays with every element equal to 0, 1, 3, 4 or 5 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

13, 113, 241, 1442, 7580, 45897, 320405, 2489823, 20679119, 181479109, 1638029668, 15055216000, 140041815820, 1311377207833, 12333793776935, 116324158971711, 1098943034315150, 10393405509745294, 98366682504010661, 931394618765660697

Offset

1,1

Comments

Column 6 of A302877.

Links

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

Example

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

Crossrefs

Cf. A302877.

Sequence in context: A303038 A141937 A320464 * A303523 A244763 A320463

Adjacent sequences: A302872 A302873 A302874 * A302876 A302877 A302878

Keyword

nonn

Author

R. H. Hardin, Apr 15 2018

Status

approved