A297543 Number of nX7 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 2 or 3 neighboring 1s.

1, 381, 4617, 65363, 2748026, 67372651, 1610981344, 45496070039, 1204223924807, 31395434922611, 839621841413395, 22297914534222936, 589873752024831225, 15663501392099069812, 415682851416335706284, 11022783242886075047889

Offset

1,2

Comments

Column 7 of A297544.

Links

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

Example

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

Crossrefs

Cf. A297544.

Sequence in context: A035845 A028682 A222163 * A297801 A201800 A172848

Adjacent sequences: A297540 A297541 A297542 * A297544 A297545 A297546

Keyword

nonn

Author

R. H. Hardin, Dec 31 2017

Status

approved