A206841 Number of 3 X n 0..3 arrays avoiding the pattern z-2 z-1 z in any row, column, nw-to-se diagonal or ne-to-sw antidiagonal.

62, 3844, 205518, 11091161, 598618182, 32326073197, 1745398353572, 94242149338308, 5088562764245208, 274755325893611168, 14835328260073233210, 801029018974028227334, 43251318116995342267638, 2335341775687363077659074

Offset

1,1

Comments

Row 3 of A206838.

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Example

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

Crossrefs

Cf. A206838.

Sequence in context: A137219 A065991 A206833 * A206895 A207285 A042861

Adjacent sequences: A206838 A206839 A206840 * A206842 A206843 A206844

Keyword

nonn

Author

R. H. Hardin, Feb 13 2012

Status

approved