A297739 - OEIS

A297739

Number of 7 X n 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 2 or 4 neighboring 1's.

1, 13, 1026, 4676, 53173, 414651, 6241242, 56834907, 675663465, 6893539424, 81152925020, 872784930365, 9965405854651, 109677107185776, 1242862523673395, 13837791169587782, 156042319458946688, 1745891736485935186

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,2

COMMENTS

Row 7 of A297733.

LINKS

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

EXAMPLE

Some solutions for n=5

..0..0..1..0..0. .0..1..1..1..1. .0..0..0..0..0. .0..0..0..0..0

..0..1..1..1..1. .0..1..1..1..1. .1..1..1..1..1. .0..1..1..1..0

..1..1..1..1..0. .0..0..0..0..0. .0..1..0..1..0. .0..1..1..1..0

..0..0..1..0..0. .0..1..1..1..1. .0..1..0..0..0. .0..0..0..0..0

..1..1..0..1..1. .1..1..0..1..0. .1..1..1..0..0. .1..1..1..0..0

..0..1..0..1..0. .1..0..1..1..1. .1..0..1..0..0. .0..1..0..0..0

..0..0..1..0..0. .0..1..0..0..0. .0..1..0..0..0. .1..1..1..0..0

CROSSREFS

Cf. A297733.

Sequence in context: A203708 A342811 A301870 * A128685 A292337 A201118

Adjacent sequences: A297736 A297737 A297738 * A297740 A297741 A297742

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 04 2018

STATUS

approved