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A222675
Number of nX4 0..3 arrays with no more than floor(nX4/2) elements unequal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..3 order
1
4, 10, 58, 527, 8276, 133028, 2363628, 40206464, 727306856, 12525102179, 225526086320, 3916711645116, 70238669794180, 1227292294581568, 21942415435228510, 385251466640023275, 6872913615981792520
OFFSET
1,1
COMMENTS
Column 4 of A222679
LINKS
EXAMPLE
Some solutions for n=3
..0..0..0..0....0..1..1..1....0..0..0..1....0..0..1..2....0..0..0..0
..0..0..0..0....0..1..1..1....0..0..0..1....0..0..0..0....0..0..0..0
..1..1..0..0....2..1..1..1....0..0..0..2....0..0..0..0....0..0..1..2
CROSSREFS
Sequence in context: A104363 A092190 A328036 * A328155 A209030 A220824
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 28 2013
STATUS
approved