A268788 Number of nX7 binary arrays with some element plus some horizontally, vertically or antidiagonally adjacent neighbor totalling two exactly once.

38, 850, 14984, 228384, 3295246, 45515227, 611932378, 8057509992, 104456486696, 1337467436839, 16954554895936, 213155407369839, 2661273257222436, 33030289066656341, 407868045265169610, 5014148928763408926

Offset

1,1

Comments

Column 7 of A268789.

Links

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

R. H. Hardin, Empirical recurrence of order 68

Formula

Empirical recurrence of order 68 (see link above)

Example

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

Crossrefs

Cf. A268789.

Sequence in context: A020930 A104761 A270500 * A016075 A028226 A028224

Adjacent sequences: A268785 A268786 A268787 * A268789 A268790 A268791

Keyword

nonn

Author

R. H. Hardin, Feb 13 2016

Status

approved