login
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
1
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
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
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 26 2013
STATUS
approved