A297643 Number of 7Xn 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 0, 2 or 3 neighboring 1s.

128, 883, 48187, 740555, 24145671, 659362756, 21730243952, 663509235615, 21859378312321, 724165420377581, 24219665849222547, 809099326344802420, 27220764680023740725, 917228208040260033845, 30924465146142596889719

Offset

1,1

Comments

Row 7 of A297637.

Links

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

Example

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

Crossrefs

Cf. A297637.

Sequence in context: A218070 A188151 A372094 * A224043 A188841 A188704

Adjacent sequences: A297640 A297641 A297642 * A297644 A297645 A297646

Keyword

nonn

Author

R. H. Hardin, Jan 02 2018

Status

approved