A222908 Number of 3Xn 0..3 arrays with no more than floor(3Xn/2) elements unequal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..3 order

5, 14, 45, 373, 1202, 18981, 82020, 1506810, 6857704, 129852811, 597088326, 11405469595, 52673539459, 1011491590878, 4687412959525, 90358383040770, 419948850379586, 8119819516703235, 37831903319054460, 733292643562816976

Offset

1,1

Comments

Row 3 of A222906

Links

R. H. Hardin, Table of n, a(n) for n = 1..58

Example

Some solutions for n=3
..0..0..1....0..1..0....0..0..1....0..0..0....0..0..1....0..0..0....0..0..0
..0..1..1....0..0..0....0..0..0....0..0..0....0..2..2....0..0..0....1..2..2
..1..1..1....0..0..0....0..0..0....0..0..1....2..2..2....0..1..1....2..2..2

Crossrefs

Sequence in context: A270062 A236043 A270661 * A270911 A270154 A271307

Adjacent sequences: A222905 A222906 A222907 * A222909 A222910 A222911

Keyword

nonn

Author

R. H. Hardin Mar 09 2013

Status

approved