A207776 Number of 6Xn 0..1 arrays avoiding 0 0 0 and 1 1 1 horizontally and 0 0 1 and 0 1 0 vertically

21, 441, 972, 7164, 43264, 195160, 1246206, 7381202, 35627804, 220514498, 1274712127, 6417933773, 38976638418, 221650017452, 1149943284883, 6878942092623, 38712906007620, 205352839927648, 1212860472464769

Offset

1,1

Comments

Row 6 of A207774

Links

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

Example

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

Crossrefs

Sequence in context: A218840 A171326 A092499 * A207273 A207766 A207733

Adjacent sequences: A207773 A207774 A207775 * A207777 A207778 A207779

Keyword

nonn

Author

R. H. Hardin Feb 20 2012

Status

approved