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A222452
Number of nX4 0..1 arrays with exactly floor(nX4/2) elements unequal to at least one horizontal, vertical or antidiagonal neighbor, with new values introduced in row major 0..1 order
1
3, 7, 17, 101, 426, 1722, 8483, 46788, 246899, 1263032, 6568737, 34802586, 184657217, 976867173, 5178449568, 27557967928, 146974586179, 784645686795, 4194027064034, 22450449919571, 120330101083792, 645608703621958
OFFSET
1,1
COMMENTS
Column 4 of A222456
LINKS
EXAMPLE
Some solutions for n=4
..0..0..1..1....0..0..0..0....0..0..1..1....0..0..0..0....0..0..0..0
..0..0..1..1....0..0..0..0....0..0..1..1....1..1..0..0....0..0..0..0
..0..0..1..1....1..1..1..1....0..0..0..0....0..0..0..0....1..1..0..0
..0..0..1..1....1..1..1..1....0..0..0..0....0..0..0..0....1..1..0..0
CROSSREFS
Sequence in context: A128343 A106877 A041949 * A218165 A102329 A331713
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 20 2013
STATUS
approved