A185749 Number of (n+1)X9 binary arrays with every 2X2 subblock trace equal to some horizontal or vertical neighbor 2X2 subblock trace

7528, 1494072, 148782184, 16318664224, 1793861476320, 197100662468008, 21671299631697840, 2382038434840423712, 261857186889698585032, 28785387230187042741928, 3164343356615626181734896

Offset

1,1

Comments

Column 8 of A185750

Links

R. H. Hardin, Table of n, a(n) for n = 1..50

Example

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

Crossrefs

Sequence in context: A090742 A273382 A186938 * A077096 A031137 A210171

Adjacent sequences: A185746 A185747 A185748 * A185750 A185751 A185752

Keyword

nonn

Author

R. H. Hardin Feb 01 2011

Status

approved