A278175 Number of nX6 0..1 arrays with every element both equal and not equal to some elements at offset (-1,0) (-1,1) (0,-1) (0,1) (1,-1) or (1,0), with upper left element zero.

0, 137, 4551, 205363, 9120939, 408355632, 18218081491, 813097394374, 36285966496008, 1619341940295084, 72266408849439553, 3225035964623559710, 143923783835527234449, 6422891413398861709329, 286634583241796971035956

Offset

1,2

Comments

Column 6 of A278177.

Links

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

Example

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

Crossrefs

Cf. A278177.

Sequence in context: A094488 A221346 A138348 * A261973 A357131 A103878

Adjacent sequences: A278172 A278173 A278174 * A278176 A278177 A278178

Keyword

nonn

Author

R. H. Hardin, Nov 13 2016

Status

approved