A280484 Number of 5Xn 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, 846, 17406, 214635, 2272190, 22475478, 208736159, 1872290290, 16303280577, 138811090897, 1160103714772, 9546680180339, 77537445203196, 622719069148966, 4952853901078386, 39060613089881366, 305763598880219395

Offset

1,2

Comments

Row 5 of A280480.

Links

R. H. Hardin, Table of n, a(n) for n = 1..32

Example

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

Crossrefs

Cf. A280480.

Sequence in context: A160212 A188296 A187861 * A203335 A252253 A247532

Adjacent sequences: A280481 A280482 A280483 * A280485 A280486 A280487

Keyword

nonn

Author

R. H. Hardin, Jan 04 2017

Status

approved