A207430 Number of 6Xn 0..1 arrays avoiding 0 0 0 and 0 1 0 horizontally and 0 0 1 and 0 1 0 vertically

21, 441, 3633, 29929, 341329, 3892729, 39698733, 404854641, 4315250265, 45995236225, 481815567745, 5047180107649, 53243344229835, 561670803164025, 5908341620443125, 62151175576890625, 654538444302027625

Offset

1,1

Comments

Row 6 of A207426

Links

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

Example

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

Crossrefs

Sequence in context: A207121 A207440 A188691 * A208372 A206874 A188504

Adjacent sequences: A207427 A207428 A207429 * A207431 A207432 A207433

Keyword

nonn

Author

R. H. Hardin Feb 17 2012

Status

approved