A267426 Number of 4Xn arrays containing n copies of 0..4-1 with every element equal to or 1 greater than any west, northeast or northwest neighbors modulo 4 and the upper left element equal to 0.

6, 1, 1, 1, 1, 1, 1, 5, 27, 147, 716, 3088, 11526, 39526, 124957, 373857, 1064784, 2933131, 7873273, 20899636, 55550356, 150499069, 422235945, 1241600062, 3831289921, 12297881055, 40444127432, 134225228520, 444175261116

Offset

1,1

Comments

Row 4 of A267425.

Links

R. H. Hardin, Table of n, a(n) for n = 1..41

Example

Some solutions for n=9
..0..0..1..1..1..2..2..3..3....0..0..0..1..1..2..2..3..3
..0..1..1..2..2..2..3..3..0....0..1..1..1..2..2..3..3..3
..1..1..2..2..3..3..3..0..0....1..1..1..2..2..3..3..0..0
..1..2..2..3..3..0..0..0..1....1..2..2..2..3..3..0..0..0

Crossrefs

Cf. A267425.

Sequence in context: A348039 A143532 A348947 * A202917 A324396 A234959

Adjacent sequences: A267423 A267424 A267425 * A267427 A267428 A267429

Keyword

nonn

Author

R. H. Hardin, Jan 14 2016

Status

approved