A277772 Number of 7Xn 0..2 arrays with every element equal to some element at offset (-1,-1) (-1,0) (-1,1) (0,-1) (0,1) or (1,0) both plus 1 mod 3 and minus 1 mod 3, with new values introduced in order 0..2.

0, 1304, 560809, 280603511, 145416104585, 74591651561541, 38224184451654485, 19594056304528558357, 10045114847567207328081, 5149301096028551482379853, 2639661525564889493885834000, 1353158899116458615963424246675

Offset

1,2

Comments

Row 7 of A277767.

Links

Table of n, a(n) for n=1..12.

Example

Some solutions for n=2
..0..1. .0..1. .0..1. .0..1. .0..1. .0..1. .0..1. .0..1. .0..1. .0..1
..2..2. .2..2. .2..2. .2..2. .2..2. .2..2. .2..2. .2..2. .2..2. .2..2
..0..2. .0..1. .1..0. .1..0. .1..0. .0..1. .1..0. .0..1. .1..0. .0..2
..1..1. .2..0. .0..2. .0..1. .2..0. .1..0. .2..1. .0..2. .2..2. .1..1
..2..0. .1..0. .1..1. .2..2. .1..0. .2..2. .0..1. .1..2. .1..0. .0..2
..1..2. .0..2. .2..0. .1..0. .2..0. .0..1. .1..2. .0..2. .1..2. .0..1
..1..0. .1..0. .1..0. .0..2. .2..1. .2..1. .0..0. .1..0. .0..0. .0..2

Crossrefs

Cf. A277767.

Sequence in context: A071847 A014356 A252308 * A252844 A252845 A252841

Adjacent sequences: A277769 A277770 A277771 * A277773 A277774 A277775

Keyword

nonn

Author

R. H. Hardin, Oct 29 2016

Status

approved