A302308 Number of nX7 0..1 arrays with every element equal to 0, 1, 3 or 4 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

21, 363, 275, 2048, 4772, 18992, 76642, 364922, 1991487, 11850372, 74391348, 486418706, 3257213385, 22149432404, 152046330078, 1049873091893, 7276150005243, 50546516116050, 351666937737820, 2449012961612884

Offset

1,1

Comments

Column 7 of A302309.

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..0. .0..1..0..1..0..1..0. .0..1..0..1..1..1..0
..0..1..0..1..0..1..0. .0..1..0..1..0..0..0. .0..0..0..1..0..1..0
..0..1..0..1..0..1..0. .1..0..0..1..1..1..1. .1..1..1..1..1..0..1
..0..1..0..1..0..1..1. .1..0..0..0..0..0..1. .1..0..1..1..0..0..0
..0..1..0..1..0..1..0. .0..1..0..0..1..0..1. .1..0..0..0..0..0..1

Crossrefs

Cf. A302309.

Sequence in context: A006105 A167032 A051564 * A303039 A302876 A303524

Adjacent sequences: A302305 A302306 A302307 * A302309 A302310 A302311

Keyword

nonn

Author

R. H. Hardin, Apr 05 2018

Status

approved