A222611 Number of n X 3 0..3 arrays with no more than floor(n X 3/2) elements unequal to at least one horizontal, vertical or antidiagonal neighbor, with new values introduced in row major 0..3 order.

1, 3, 5, 65, 181, 3545, 11421, 243955, 829319, 17592855, 61952605, 1284213397, 4662579053, 94370045311, 351914237859, 6970771357553, 26611889407629, 517258600443449, 2015559262618275, 38540189430369807, 152866542948213595

Offset

1,2

Comments

Column 3 of A222616.

Links

R. H. Hardin, Table of n, a(n) for n = 1..204

Example

All solutions for n=3
..0..0..0....0..1..1....0..0..0....0..0..0....0..0..1
..0..0..0....1..1..1....0..0..0....0..0..0....0..0..0
..0..0..1....1..1..1....1..0..0....0..0..0....0..0..0

Crossrefs

Cf. A222616.

Sequence in context: A319584 A318546 A076513 * A261071 A247862 A348205

Adjacent sequences: A222608 A222609 A222610 * A222612 A222613 A222614

Keyword

nonn

Author

R. H. Hardin, Feb 26 2013

Status

approved