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A185839
Number of (n+1)X4 0..2 arrays with every 2X2 subblock trace equal to some horizontal or vertical neighbor 2X2 subblock trace
1
405, 20097, 424197, 10670517, 254648349, 6182861913, 149296412943, 3610924080057, 87290961055317, 2110537794502179, 51026182728455493, 1233673268942605563, 29826690561521146107, 721125280774829859129
OFFSET
1,1
COMMENTS
Column 3 of A185845
LINKS
EXAMPLE
Some solutions for 3X4
..2..1..1..0....0..1..0..2....1..0..2..2....2..2..0..1....1..0..0..2
..2..2..0..0....1..2..2..2....2..2..2..0....1..1..0..1....0..0..2..2
..0..2..2..1....0..1..1..0....1..1..0..0....1..2..1..1....0..1..2..0
CROSSREFS
Sequence in context: A219147 A239541 A187134 * A285924 A285860 A151634
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 05 2011
STATUS
approved