A303083 Number of n X 7 0..1 arrays with every element equal to 0, 2, 3, 4 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

1, 496, 2525, 33152, 636070, 13375327, 266882021, 5754725245, 125608726910, 2751441878716, 60560951633302, 1338653889825967, 29617783009064771, 655764759948936409, 14528234528855832400, 321957970196713225956

Offset

1,2

Comments

Column 7 of A303084.

Links

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

Example

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

Crossrefs

Cf. A303084.

Sequence in context: A157447 A109477 A302366 * A302888 A349699 A303623

Adjacent sequences: A303080 A303081 A303082 * A303084 A303085 A303086

Keyword

nonn

Author

R. H. Hardin, Apr 18 2018

Status

approved