A297463 Number of 7Xn 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 0 or 2 neighboring 1s.

128, 747, 28971, 321030, 7800563, 113851142, 2300975096, 37653648610, 705689802345, 12115751030274, 220095891743741, 3855144159687638, 69132535354215370, 1221050947348463138, 21779032292961728994

Offset

1,1

Comments

Row 7 of A297457.

Links

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

Example

Some solutions for n=3
..0..0..0. .0..0..1. .1..0..1. .1..1..0. .1..0..0. .1..0..1. .0..1..0
..1..0..0. .0..0..1. .0..0..0. .0..1..1. .1..0..0. .0..0..0. .0..1..0
..1..0..1. .0..0..0. .1..0..0. .0..0..0. .1..0..0. .1..0..0. .0..0..0
..1..0..1. .0..0..1. .0..0..1. .0..0..1. .1..0..0. .1..0..0. .0..1..0
..1..0..0. .1..0..1. .1..0..1. .1..0..0. .0..0..0. .0..0..1. .1..1..1
..1..0..1. .1..0..0. .0..0..0. .0..0..0. .0..0..1. .1..0..1. .0..0..0
..1..0..1. .0..0..1. .0..0..1. .0..0..0. .0..0..0. .1..0..0. .0..0..0

Crossrefs

Cf. A297457.

Sequence in context: A333584 A349110 A366827 * A297700 A218070 A188151

Adjacent sequences: A297460 A297461 A297462 * A297464 A297465 A297466

Keyword

nonn

Author

R. H. Hardin, Dec 30 2017

Status

approved