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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.
0
1, 1, 5, 52, 790, 23564, 1188839, 110266512, 18113056960, 5286615353516, 2755789744812452
OFFSET
1,3
COMMENTS
Diagonal of A280069.
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
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 25 2016
STATUS
approved