A281604 Number of n X 7 0..2 arrays with no element equal to more than one of its horizontal, diagonal or antidiagonal neighbors and with new values introduced in order 0 sequentially upwards.

224, 6596, 302304, 15975093, 839574485, 44428349137, 2352459742664, 124612725916938, 6601564375598261, 349739353333596632

Offset

1,1

Comments

Column 7 of A281605.

Links

Table of n, a(n) for n=1..10.

Example

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

Crossrefs

Cf. A281605.

Sequence in context: A032802 A224431 A280858 * A007771 A229459 A051367

Adjacent sequences: A281601 A281602 A281603 * A281605 A281606 A281607

Keyword

nonn

Author

R. H. Hardin, Jan 25 2017

Status

approved