A207755 Number of 6Xn 0..1 arrays avoiding 0 0 1 and 0 1 1 horizontally and 0 0 1 and 1 0 0 vertically

22, 484, 2354, 11449, 34668, 104976, 247860, 585225, 1182690, 2390116, 4339622, 7879249, 13226584, 22202944, 35099688, 55487601, 83652270, 126112900, 182947930, 265396681, 372933572, 524043664, 716908764, 980754489, 1311368058

Offset

1,1

Comments

Row 6 of A207752

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Formula

Empirical: a(n) = 2*a(n-1) +6*a(n-2) -14*a(n-3) -14*a(n-4) +42*a(n-5) +14*a(n-6) -70*a(n-7) +70*a(n-9) -14*a(n-10) -42*a(n-11) +14*a(n-12) +14*a(n-13) -6*a(n-14) -2*a(n-15) +a(n-16)

Example

Some solutions for n=4
..1..0..0..0....1..0..1..0....1..1..1..0....1..0..0..0....0..1..0..0
..0..0..0..0....0..1..0..0....0..1..0..1....0..1..0..1....0..0..0..0
..1..0..0..0....1..1..1..0....1..0..1..0....1..0..0..0....0..1..0..0
..0..0..0..0....1..0..0..0....0..1..0..1....1..1..0..1....0..0..0..0
..1..0..0..0....1..1..1..0....1..1..1..0....0..1..0..1....0..1..0..0
..0..0..0..0....1..1..0..0....0..1..0..1....1..1..0..1....0..0..0..0

Crossrefs

Sequence in context: A208005 A207567 A209648 * A207936 A208696 A207503

Adjacent sequences: A207752 A207753 A207754 * A207756 A207757 A207758

Keyword

nonn

Author

R. H. Hardin Feb 19 2012

Status

approved