A276253 Number of 7Xn 0..2 arrays with no element equal to any value at offset (-2,-1) (-1,1) or (0,-2) and new values introduced in order 0..2.

365, 9216, 23000, 188696, 2003694, 18671229, 219977330, 2410124377, 24361263053, 272372552980, 2985497491633, 31231199543135, 341233988414188, 3723139799743418, 39589701942441676, 428949119346736027

Offset

1,1

Comments

Row 7 of A276248.

Links

R. H. Hardin, Table of n, a(n) for n = 1..176

Example

Some solutions for n=4
..0..0..1..2. .0..1..1..0. .0..0..1..2. .0..0..1..1. .0..1..2..0
..2..2..1..0. .0..0..1..2. .2..0..0..2. .1..0..2..2. .0..0..2..1
..1..2..2..0. .1..2..0..0. .2..1..1..0. .2..1..1..0. .1..1..0..0
..0..0..1..2. .0..1..1..2. .2..0..1..1. .0..2..1..0. .0..2..1..0
..1..2..0..0. .2..0..0..1. .1..0..2..2. .0..0..2..2. .0..0..2..1
..0..1..2..2. .1..2..0..0. .2..1..1..0. .2..1..1..2. .1..1..0..0
..0..0..1..2. .0..1..1..2. .0..2..2..0. .0..2..1..1. .0..2..2..1

Crossrefs

Cf. A276248.

Sequence in context: A274727 A175113 A222992 * A233116 A208433 A275357

Adjacent sequences: A276250 A276251 A276252 * A276254 A276255 A276256

Keyword

nonn

Author

R. H. Hardin, Aug 25 2016

Status

approved