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A222271
Number of nX3 0..3 arrays with exactly floor(nX3/2) elements unequal to at least one horizontal or vertical neighbor, with new values introduced in row major 0..3 order
1
0, 4, 4, 81, 364, 5996, 27980, 507909, 2380692, 44501178, 208717216, 3948025953, 18510211252, 352744650956, 1653908717680, 31689827693324, 148654828631998, 2860214905912758, 13427178703144724, 259196177077920492
OFFSET
1,2
COMMENTS
Column 3 of A222275
LINKS
EXAMPLE
All solutions for n=3
..0..0..0....0..0..0....0..1..0....0..0..0
..0..0..1....0..0..0....0..0..0....1..0..0
..0..0..0....0..1..0....0..0..0....0..0..0
CROSSREFS
Sequence in context: A327303 A337302 A351349 * A068376 A131592 A317868
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 14 2013
STATUS
approved