A206834 Number of nX4 0..3 arrays avoiding the pattern z-2 z-1 z in any row, column, nw-to-se diagonal or ne-to-sw antidiagonal.

241, 58081, 11091161, 2152805235, 413843625776, 79716622309437, 15348900754966668, 2955760887154751440, 569180485178587224840, 109606019483652083444194, 21106586871668692105099671

Offset

1,1

Comments

Column 4 of A206838

Links

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

Example

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

Crossrefs

Sequence in context: A133327 A001361 A206842 * A206896 A207286 A217998

Adjacent sequences: A206831 A206832 A206833 * A206835 A206836 A206837

Keyword

nonn

Author

R. H. Hardin, Feb 13 2012

Status

approved