A222612 Number of nX4 0..3 arrays with no more than floor(nX4/2) elements unequal to at least one horizontal, vertical or antidiagonal neighbor, with new values introduced in row major 0..3 order

4, 12, 65, 567, 5746, 85511, 1409334, 23117220, 385330520, 6476514601, 108758391488, 1826675971872, 30708013301383, 516416025560708, 8686858217305854, 146176023166781075, 2460556661008587521

Offset

1,1

Comments

Column 4 of A222616

Links

R. H. Hardin, Table of n, a(n) for n = 1..75

Example

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

Crossrefs

Sequence in context: A071769 A221667 A275527 * A339134 A000843 A369284

Adjacent sequences: A222609 A222610 A222611 * A222613 A222614 A222615

Keyword

nonn

Author

R. H. Hardin Feb 26 2013

Status

approved