A207210 Number of 4Xn 0..2 arrays avoiding the pattern z-1 z-1 z in any row, column, nw-to-se diagonal or ne-to-sw antidiagonal

69, 4761, 193260, 7766709, 317286068, 12984008418, 532255213048, 21835412816853, 896199356290361, 36788855988407609, 1510305130233697178, 62003928383215093877, 2545527670668435810253, 104504881974943586269358

Offset

1,1

Comments

Row 4 of A207208

Links

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

Example

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

Crossrefs

Sequence in context: A202978 A206859 A207204 * A206953 A206730 A207354

Adjacent sequences: A207207 A207208 A207209 * A207211 A207212 A207213

Keyword

nonn

Author

R. H. Hardin Feb 15 2012

Status

approved