A296326 Number of nX7 0..1 arrays with each 1 horizontally, vertically or antidiagonally adjacent to 2 neighboring 1s.

1, 45, 278, 1677, 14691, 112235, 850404, 6660799, 51754039, 401363520, 3119306759, 24239641260, 188341349284, 1463488096858, 11372085577974, 88367785063892, 686667612240495, 5335806199766372, 41462375276685856, 322187049424431729

Offset

1,2

Comments

Column 7 of A296327.

Links

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

Example

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

Crossrefs

Cf. A296327.

Sequence in context: A089549 A178540 A351534 * A064561 A291177 A341568

Adjacent sequences: A296323 A296324 A296325 * A296327 A296328 A296329

Keyword

nonn

Author

R. H. Hardin, Dec 10 2017

Status

approved