A293106 Number of 7 X n 0..1 arrays with the number of 1's horizontally, diagonally or antidiagonally adjacent to some 0 two less than the number of 0's adjacent to some 1.

0, 2088, 202363, 25504769, 2804027631, 331401441383, 38469698642410, 4639160801369811, 553541878970691305, 67495383900522580833, 8184590699346266638663, 1005200402879395725773000

Offset

1,2

Comments

Row 7 of A293100.

Links

R. H. Hardin, Table of n, a(n) for n = 1..14

Example

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

Crossrefs

Cf. A293100.

Sequence in context: A201917 A250076 A255146 * A221360 A106720 A179124

Adjacent sequences: A293103 A293104 A293105 * A293107 A293108 A293109

Keyword

nonn

Author

R. H. Hardin, Sep 30 2017

Status

approved