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A222535
Number of nX2 0..1 arrays with no more than floor(nX2/2) elements unequal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..1 order
2
1, 1, 5, 16, 29, 78, 236, 638, 1515, 4345, 11927, 32187, 84684, 238656, 646520, 1771466, 4811845, 13396324, 36540256, 100927019, 277135515, 768770834, 2113207392, 5856167133, 16164388090, 44845294779, 123927192659, 344021294163
OFFSET
1,3
COMMENTS
Column 2 of A222541
LINKS
EXAMPLE
All solutions for n=3
..0..0....0..1....0..0....0..0....0..1
..0..0....0..0....0..0....0..0....1..1
..1..0....0..0....0..1....0..0....1..1
CROSSREFS
Sequence in context: A299882 A212457 A134594 * A063076 A270805 A132479
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 24 2013
STATUS
approved