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A222489
Number of 2Xn 0..2 arrays with exactly floor(2Xn/2) elements unequal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..2 order.
1
0, 0, 4, 5, 14, 100, 152, 998, 2168, 10768, 25816, 125264, 303568, 1457312, 3658176, 16964356, 44394392, 199079568, 539372480, 2352788576, 6567620800, 27950582336, 80148609344, 333551963152, 979715239584, 3996802471680, 11991536245888
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OFFSET
1,3
COMMENTS
Row 2 of
A222488
LINKS
R. H. Hardin,
Table of n, a(n) for n = 1..65
EXAMPLE
All solutions for n=4
..0..0..1..1....0..1..1..1....0..0..0..1....0..0..0..1....0..1..1..1
..0..0..1..1....0..1..1..1....0..0..0..1....0..0..0..2....2..1..1..1
CROSSREFS
Sequence in context:
A041034
A281911
A042535
*
A222501
A225204
A363817
Adjacent sequences:
A222486
A222487
A222488
*
A222490
A222491
A222492
KEYWORD
nonn
AUTHOR
R. H. Hardin
, Feb 22 2013
STATUS
approved
