A267074 Number of 4Xn arrays containing n copies of 0..4-1 with no element 1 greater than its west or southwest neighbor modulo 4 and the upper left element equal to 0.

6, 44, 1129, 30637, 775567, 21970109, 676906680, 21300928198, 681356875633, 22263527673539, 739749532618244, 24869575479353155, 844359305686979781, 28920001414149308262, 998012306992020016156, 34663335569939361225767

Offset

1,1

Comments

Row 4 of A267072.

Links

R. H. Hardin, Table of n, a(n) for n = 1..20

Example

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

Crossrefs

Cf. A267072.

Sequence in context: A284218 A295978 A194928 * A271963 A065783 A158460

Adjacent sequences: A267071 A267072 A267073 * A267075 A267076 A267077

Keyword

nonn

Author

R. H. Hardin, Jan 10 2016

Status

approved