A185889 1/729 the number of (n+2)X9 0..2 arrays with no 3X3 subblock trace equal to any horizontal or vertical neighbor 3X3 subblock trace

2975926392, 7705358302364, 22854468047098854, 66791286531734378864, 194280290689274140633844, 568914892688849805876146686

Offset

1,1

Comments

Column 7 of A185891

Links

Table of n, a(n) for n=1..6.

Example

Some solutions for 4X9
..0..0..0..1..2..2..1..0..2....0..0..0..1..2..0..1..1..2
..0..0..0..0..0..0..2..0..1....0..0..0..0..0..0..1..0..2
..0..0..0..1..0..0..0..1..1....0..0..0..1..0..0..0..0..1
..0..0..1..0..0..0..1..0..1....0..0..1..0..0..0..1..0..0

Crossrefs

Sequence in context: A116577 A067615 A204338 * A186093 A357461 A336966

Adjacent sequences: A185886 A185887 A185888 * A185890 A185891 A185892

Keyword

nonn

Author

R. H. Hardin Feb 05 2011

Status

approved