A222797 Number of 4 X n 0..3 arrays with exactly floor(4 X n/2) elements unequal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..3 order.

0, 55, 582, 5896, 77978, 1026076, 16057219, 270356931, 4839768207, 87744222973, 1625112028196, 30017943451242, 560333237658238, 10415517238281763, 194928267700372590, 3636239113386478485, 68162163149444063427

Offset

1,2

Comments

Row 4 of A222794.

Links

R. H. Hardin, Table of n, a(n) for n = 1..31

Example

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

Crossrefs

Cf. A222794.

Sequence in context: A138053 A183320 A185028 * A180326 A119085 A119170

Adjacent sequences: A222794 A222795 A222796 * A222798 A222799 A222800

Keyword

nonn

Author

R. H. Hardin Mar 05 2013

Status

approved