A208413 Number of 6Xn 0..3 arrays with new values 0..3 introduced in row major order and no element equal to more than two of its immediate leftward or upward or right-upward antidiagonal neighbors

187, 700075, 2646531062, 10084768380770, 38410047476679936, 146298576850884166522, 557229580446475130201608, 2122405243795588131572978866, 8083928267793741312454314127058

Offset

1,1

Comments

Row 6 of A208408

Links

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

Example

Some solutions for n=4
..0..1..0..0....0..0..0..0....0..0..0..0....0..0..0..1....0..0..0..0
..1..0..1..0....0..1..0..1....1..1..2..1....1..2..2..0....1..1..2..0
..2..3..1..3....2..1..3..2....1..2..1..3....1..3..1..3....2..2..1..0
..2..2..1..1....1..3..0..3....2..3..1..0....1..0..3..3....3..2..2..0
..3..2..0..1....1..0..2..1....0..1..1..1....3..2..1..3....2..3..3..0
..0..3..3..1....0..3..3..3....1..2..2..3....2..2..2..2....1..2..3..2

Crossrefs

Sequence in context: A241118 A208199 A208406 * A198905 A198252 A070257

Adjacent sequences: A208410 A208411 A208412 * A208414 A208415 A208416

Keyword

nonn

Author

R. H. Hardin Feb 26 2012

Status

approved