A185857 1/128 the number of (n+2)X(n+2) binary arrays with no 3X3 subblock trace equal to any horizontal or vertical neighbor 3X3 subblock trace

4, 164, 13662, 2306566, 791291609, 573531587857, 902732470133370, 3086713019542215751, 23108662756908572007017, 381917128482182677085935919, 13958774280516860898206752249339, 1128842211487228958365462356514577926

Offset

1,1

Comments

Diagonal of A185866

Links

R. H. Hardin, Table of n, a(n) for n = 1..13

Example

Some solutions for 4X4
..1..0..1..1....0..1..1..1....0..1..0..1....1..0..0..1....1..0..1..0
..0..0..0..0....0..0..0..1....0..0..0..0....1..1..0..1....0..0..1..0
..1..0..1..1....1..1..0..0....1..1..0..1....0..0..1..1....0..0..0..1
..0..1..0..1....1..0..1..0....1..1..1..0....1..1..0..1....1..1..0..1

Crossrefs

Sequence in context: A125532 A229405 A211157 * A347719 A221654 A159011

Adjacent sequences: A185854 A185855 A185856 * A185858 A185859 A185860

Keyword

nonn

Author

R. H. Hardin Feb 05 2011

Status

approved