A297732 Number of nX7 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 2 or 4 neighboring 1s.

1, 145, 700, 4795, 82549, 673171, 6241242, 74469526, 718454750, 7237789501, 78605147646, 802756282257, 8321237610322, 88309948248405, 920709083264361, 9652601225861871, 101986973953809025, 1072161304466219489

Offset

1,2

Comments

Column 7 of A297733.

Links

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

Example

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

Crossrefs

Cf. A297733.

Sequence in context: A116208 A211470 A031702 * A354669 A296972 A365204

Adjacent sequences: A297729 A297730 A297731 * A297733 A297734 A297735

Keyword

nonn

Author

R. H. Hardin, Jan 04 2018

Status

approved