A266320 Number of 4Xn arrays containing n copies of 0..4-1 with no element 1 greater than its west or north neighbor modulo 4 and the upper left element equal to 0.

2, 35, 614, 14757, 389210, 11164877, 336050370, 10471716466, 334707045422, 10909891558641, 361173506045775, 12109032914056961, 410281858261484581, 14026033480563753446, 483191706816097638384, 16757117277633866294454

Offset

1,1

Comments

Row 4 of A266318.

Links

R. H. Hardin, Table of n, a(n) for n = 1..23

Example

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

Crossrefs

Cf. A266318.

Sequence in context: A369470 A218119 A350340 * A112442 A066549 A279734

Adjacent sequences: A266317 A266318 A266319 * A266321 A266322 A266323

Keyword

nonn

Author

R. H. Hardin, Dec 27 2015

Status

approved