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A181038
Number of nX4 binary matrices with no initial bit string in any row or column divisible by 6
0
1, 6, 18, 108, 410, 2128, 8877, 42883, 186732, 872119, 3875520, 17814874, 79942755, 364719182, 1644428972, 7475300460, 33782717781, 153302897126, 693611114280, 3144849890670
OFFSET
1,2
COMMENTS
Column 4 of A181039
EXAMPLE
Some solutions for 6X4
..1..1..1..1....1..1..1..1....1..1..1..1....1..1..1..1....1..1..1..1
..1..0..0..0....1..0..0..1....1..0..1..0....1..0..0..1....1..0..0..0
..1..1..1..1....1..0..0..1....1..0..1..1....1..0..0..1....1..1..1..0
..1..0..1..0....1..0..1..0....1..1..1..1....1..1..1..1....1..1..1..0
..1..0..1..0....1..0..1..1....1..1..1..0....1..1..1..1....1..0..1..1
..1..1..1..0....1..0..1..0....1..1..1..0....1..0..0..0....1..0..0..0
CROSSREFS
Sequence in context: A009573 A052655 A274499 * A222857 A367664 A361729
KEYWORD
nonn
AUTHOR
R. H. Hardin Sep 30 2010
STATUS
approved