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A222270 Number of nX2 0..3 arrays with exactly floor(nX2/2) elements unequal to at least one horizontal or vertical neighbor, with new values introduced in row major 0..3 order 2
0, 0, 4, 13, 40, 162, 888, 3617, 18136, 81560, 407644, 1901375, 9349056, 44712494, 218395880, 1057844425, 5154076928, 25146813236, 122532346416, 600293886818, 2928771248408, 14383619678744, 70298507431888, 345790800489643 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,3
COMMENTS
Column 2 of A222275
LINKS
EXAMPLE
All solutions for n=3
..0..1....0..0....0..1....0..0
..1..1....0..0....0..0....0..0
..1..1....1..0....0..0....0..1
CROSSREFS
Sequence in context: A034742 A149424 A097112 * A351892 A213496 A220926
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 14 2013
STATUS
approved

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Last modified February 26 07:39 EST 2024. Contains 370335 sequences. (Running on oeis4.)