A186140 Number of (n+1)X9 0..2 arrays with no 2X2 subblock trace equal to any horizontal or vertical neighbor 2X2 subblock trace

63009576, 58529531286, 58311925687818, 58096554299749404, 58456633907530057662, 58923376595033869477548, 59477821878604876659005166, 60068131623385389414240300432

Offset

1,1

Comments

Column 8 of A186141

Links

Table of n, a(n) for n=1..8.

Example

Some solutions for 3X9
..0..0..0..0..0..1..0..1..1....0..0..0..0..0..1..0..1..1
..0..0..1..0..1..0..1..0..2....0..0..1..0..2..0..0..0..2
..0..1..0..0..0..0..0..2..0....0..1..0..0..0..1..0..2..1

Crossrefs

Sequence in context: A157855 A017539 A227150 * A172575 A172583 A172683

Adjacent sequences: A186137 A186138 A186139 * A186141 A186142 A186143

Keyword

nonn

Author

R. H. Hardin Feb 13 2011

Status

approved