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A222501 Number of 2Xn 0..3 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..3 order 1
0, 0, 4, 5, 14, 122, 196, 1861, 4042, 32952, 75324, 618635, 1437882, 11665906, 28055204, 220984129, 550922114, 4208027596, 10854564024, 80459791286, 214468168532, 1543792231764, 4246718020040, 29714960845675, 84228546333542 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,3
COMMENTS
Row 2 of A222500
LINKS
EXAMPLE
All solutions for n=4
..0..0..0..1....0..1..1..1....0..0..0..1....0..0..1..1....0..1..1..1
..0..0..0..2....2..1..1..1....0..0..0..1....0..0..1..1....0..1..1..1
CROSSREFS
Sequence in context: A281911 A042535 A222489 * A225204 A363817 A308095
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 23 2013
STATUS
approved

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Last modified July 23 04:24 EDT 2024. Contains 374544 sequences. (Running on oeis4.)