A185844 Number of (n+1)X9 0..2 arrays with every 2X2 subblock trace equal to some horizontal or vertical neighbor 2X2 subblock trace

1731321, 3601102725, 3610924080057, 4197053176231149, 4780252449901079883, 5482800643934316189987

Offset

1,1

Comments

Column 8 of A185845

Links

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

Example

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

Crossrefs

Sequence in context: A186586 A131639 A187139 * A234130 A177695 A252589

Adjacent sequences: A185841 A185842 A185843 * A185845 A185846 A185847

Keyword

nonn

Author

R. H. Hardin Feb 05 2011

Status

approved