A280485 Number of 6Xn 0..2 arrays with no element unequal to a strict majority of its horizontal and antidiagonal neighbors, with the exception of exactly two elements, and with new values introduced in order 0 sequentially upwards.

0, 4446, 149057, 2886700, 48481917, 767741328, 11437392975, 164847196124, 2309124917462, 31632356050545, 425475246875021

Offset

1,2

Comments

Row 6 of A280480.

Links

Table of n, a(n) for n=1..11.

Example

Some solutions for n=3
..0..0..0. .0..0..0. .0..0..0. .0..0..1. .0..0..0. .0..0..0. .0..0..0
..1..1..1. .1..1..0. .1..2..1. .0..1..1. .1..1..1. .1..1..0. .1..2..2
..2..2..2. .1..0..0. .2..1..2. .0..0..2. .1..0..0. .0..0..2. .2..0..0
..2..0..1. .0..1..1. .1..2..1. .0..2..0. .0..0..1. .0..2..1. .0..1..2
..0..1..1. .1..0..0. .2..1..1. .1..0..2. .0..1..2. .2..1..1. .2..2..0
..0..1..1. .0..2..0. .0..0..0. .0..2..2. .1..2..0. .1..1..0. .2..0..0

Crossrefs

Cf. A280480.

Sequence in context: A043508 A114908 A102622 * A236906 A184611 A279042

Adjacent sequences: A280482 A280483 A280484 * A280486 A280487 A280488

Keyword

nonn

Author

R. H. Hardin, Jan 04 2017

Status

approved