A207720 Number of 5Xn 0..1 arrays avoiding 0 0 0 and 0 0 1 horizontally and 0 0 1 and 1 0 0 vertically

14, 196, 1414, 11970, 97580, 805154, 6614706, 54438356, 447687702, 3682876386, 30292582572, 249180165066, 2049642453502, 16859642486512, 138680722738530, 1140735510979302, 9383250687334776, 77183044399764898, 634878161131002558

Offset

1,1

Comments

Row 5 of A207717

Links

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

Formula

Empirical: a(n) = 4*a(n-1) +37*a(n-2) -3*a(n-3) -132*a(n-4) +26*a(n-5) +132*a(n-6) -59*a(n-7) -15*a(n-8) +6*a(n-9) +a(n-10)

Example

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

Crossrefs

Sequence in context: A208371 A208146 A207743 * A171288 A001023 A278476

Adjacent sequences: A207717 A207718 A207719 * A207721 A207722 A207723

Keyword

nonn

Author

R. H. Hardin Feb 19 2012

Status

approved