A267344 Number of 4Xn arrays containing n copies of 0..4-1 with every element equal to or 1 greater than any north, west or southwest neighbors modulo 4 and the upper left element equal to 0.

1, 1, 2, 12, 45, 135, 388, 1220, 5401, 27146, 125333, 515897, 2010472, 8064508, 34936670, 159444254, 725890833, 3205348045, 13816812300, 59601118346, 262631332138, 1183293213009, 5373170070242, 24253891624959, 108483481246313

Offset

1,3

Comments

Row 4 of A267338.

Links

R. H. Hardin, Table of n, a(n) for n = 1..37

Example

Some solutions for n=5
..0..1..1..2..3....0..1..2..3..0....0..1..1..2..3....0..1..1..2..3
..0..1..2..2..3....1..2..2..3..0....0..1..2..3..3....0..1..2..2..3
..0..1..2..3..3....1..2..3..3..0....0..1..2..3..0....0..1..2..3..0
..0..1..2..3..0....1..2..3..0..1....1..2..2..3..0....1..2..3..3..0

Crossrefs

Cf. A267338.

Sequence in context: A009074 A371487 A356868 * A275132 A276294 A066258

Adjacent sequences: A267341 A267342 A267343 * A267345 A267346 A267347

Keyword

nonn

Author

R. H. Hardin, Jan 13 2016

Status

approved