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A279970
Number of n X n 0..1 arrays with no element equal 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
0, 3, 50, 1922, 124030, 14787217, 3444870482, 1641425782980, 1628526202127628, 3404399281023205196, 15152580196285407820510
OFFSET
1,2
COMMENTS
Diagonal of A279977.
EXAMPLE
Some solutions for n=4
..0..1..1..0. .0..1..0..0. .0..1..0..0. .0..1..0..1. .0..1..0..0
..1..0..0..1. .1..1..1..0. .0..1..1..0. .0..0..0..1. .0..1..1..0
..1..0..1..0. .0..0..1..0. .1..0..1..0. .1..1..0..1. .0..0..0..1
..0..1..0..1. .1..1..0..1. .0..0..1..1. .1..1..0..1. .1..1..1..0
CROSSREFS
Cf. A279977.
Sequence in context: A308331 A245141 A203239 * A217767 A185157 A078674
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 24 2016
STATUS
approved