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A222662 Number of nX4 0..3 arrays with exactly 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
3, 9, 44, 452, 4241, 62406, 1058776, 17374571, 288771291, 4860565711, 81668904553, 1371394427050, 23054727857828, 387744337542770, 6522573483253608, 109759232573531088, 1847613631016545713, 31110964472846965874 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A222666

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..87

EXAMPLE

Some solutions for n=3

..0..0..1..1....0..0..0..0....0..0..0..1....0..1..1..1....0..0..0..1

..0..1..1..1....0..0..0..0....0..0..1..1....1..1..1..1....0..0..0..2

..2..1..1..1....1..1..0..0....0..1..1..1....0..1..1..1....0..0..0..0

CROSSREFS

Sequence in context: A028858 A058106 A021103 * A209977 A001902 A224085

Adjacent sequences:  A222659 A222660 A222661 * A222663 A222664 A222665

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 28 2013

STATUS

approved

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Last modified February 18 04:48 EST 2020. Contains 332011 sequences. (Running on oeis4.)