A265243 Number of 4Xn arrays containing n copies of 0..4-1 with no equal antidiagonal neighbors and new values introduced sequentially from 0.

1, 68, 4716, 359172, 29189088, 2481226704, 217953360768, 19628937626304, 1802766369904128, 168204846247664640, 15899323155731638272, 1519290122351403276288, 146525430785641038692352

Offset

1,2

Comments

Row 4 of A265241.

Links

R. H. Hardin, Table of n, a(n) for n = 1..30

Example

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

Crossrefs

Cf. A265241.

Sequence in context: A004298 A223226 A252977 * A331867 A267064 A159365

Adjacent sequences: A265240 A265241 A265242 * A265244 A265245 A265246

Keyword

nonn

Author

R. H. Hardin, Dec 06 2015

Status

approved