A280063 Number of n X n 0..1 arrays with no element unequal to a strict majority of its horizontal, vertical and antidiagonal neighbors and with new values introduced in order 0 sequentially upwards.

1, 1, 5, 52, 790, 23564, 1188839, 110266512, 18113056960, 5286615353516, 2755789744812452

Offset

1,3

Comments

Diagonal of A280069.

Links

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

Example

Some solutions for n=4
..0..0..1..1. .0..0..0..1. .0..0..1..1. .0..0..0..1. .0..0..0..0
..0..0..1..1. .0..0..1..1. .0..0..1..1. .0..0..1..1. .0..0..0..0
..0..0..0..0. .0..0..1..1. .0..0..1..1. .1..1..0..0. .1..1..1..0
..0..0..0..0. .0..0..0..0. .0..0..1..1. .1..0..0..0. .1..1..1..0

Crossrefs

Cf. A280069.

Sequence in context: A134111 A071583 A099881 * A363356 A365012 A367165

Adjacent sequences: A280060 A280061 A280062 * A280064 A280065 A280066

Keyword

nonn

Author

R. H. Hardin, Dec 25 2016

Status

approved