A280216 Number of nX6 0..2 arrays with no element unequal to a strict majority of its horizontal, vertical and antidiagonal neighbors, with the exception of exactly two elements, and with new values introduced in order 0 sequentially upwards.

30, 1072, 20593, 320755, 4245153, 51995541, 607401930, 6826834071, 74866926296, 803333083744, 8481136146360, 88284309868714, 908465381543452, 9254692532815689, 93470995500319234

Offset

1,1

Comments

Column 6 of A280217.

Links

Table of n, a(n) for n=1..15.

Example

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

Crossrefs

Cf. A280217.

Sequence in context: A001821 A027488 A269541 * A075187 A265101 A214820

Adjacent sequences: A280213 A280214 A280215 * A280217 A280218 A280219

Keyword

nonn

Author

R. H. Hardin, Dec 29 2016

Status

approved