A280478 Number of nX6 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.

30, 381, 15441, 618883, 22475478, 767741328, 25082093017, 792009247239, 24350633737743, 732782392386670, 21666466702540919, 631254359107473122, 18163265143313278519, 517037287890494364049, 14581505333544329061184

Offset

1,1

Comments

Column 6 of A280480.

Links

R. H. Hardin, Table of n, a(n) for n = 1..60

Example

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

Crossrefs

Cf. A280480.

Sequence in context: A251895 A022690 A224332 * A020927 A105468 A125442

Adjacent sequences: A280475 A280476 A280477 * A280479 A280480 A280481

Keyword

nonn

Author

R. H. Hardin, Jan 04 2017

Status

approved