A186017 1/8192 the number of (n+2)X9 0..3 arrays with no 3X3 subblock trace equal to any horizontal or vertical neighbor 3X3 subblock trace

894236244300, 47395262542477394, 2734847204224388546080, 157181851464796372886688987, 8989089860728323984726287971908, 514793257893476138400848117467563609

Offset

1,1

Comments

Column 7 of A186019

Links

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

Example

Some solutions for 4X9
..2..0..2..0..2..0..0..0..0....2..0..2..0..2..2..3..1..2
..0..0..0..0..0..0..0..3..0....0..0..0..0..0..0..0..3..2
..0..0..0..0..0..0..0..0..3....0..0..0..0..0..0..0..2..2
..0..0..0..1..0..2..0..2..1....0..0..0..1..0..2..0..2..2

Crossrefs

Sequence in context: A233487 A297354 A172798 * A015433 A234195 A297356

Adjacent sequences: A186014 A186015 A186016 * A186018 A186019 A186020

Keyword

nonn

Author

R. H. Hardin Feb 10 2011

Status

approved