A269058 Number of 7Xn 0..2 arrays with some element plus some horizontally, diagonally or antidiagonally adjacent neighbor totalling two not more than once.

2187, 29646, 464250, 9779808, 187575858, 3726221592, 71430596250, 1369456711662, 25864594357554, 485843586726426, 9051481373536698, 167744789740348134, 3091817487227619306, 56742145362259364580

Offset

1,1

Comments

Row 7 of A269052.

Links

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

R. H. Hardin, Empirical recurrence of order 92

Formula

Empirical recurrence of order 92 (see link above)

Example

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

Crossrefs

Cf. A269052.

Sequence in context: A232287 A219134 A233160 * A217970 A209509 A016759

Adjacent sequences: A269055 A269056 A269057 * A269059 A269060 A269061

Keyword

nonn

Author

R. H. Hardin, Feb 18 2016

Status

approved