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A206202
Number of (n+1)X5 0..3 arrays with every 2X3 or 3X2 subblock having exactly one clockwise edge increases
1
7388, 9464, 11832, 32920, 70168, 109720, 337896, 728704, 1137208, 3418192, 7313872, 11389472, 34215016, 73207664, 114003240, 342487240, 732805056, 1141169536, 3428290592, 7335364432, 11423084832, 34317120936, 73426851984
OFFSET
1,1
COMMENTS
Column 4 of A206206
LINKS
FORMULA
Empirical: a(n) = 10*a(n-3) +a(n-9) for n>18
EXAMPLE
Some solutions for n=4
..0..1..1..2..2....1..0..0..0..0....3..0..0..3..2....2..3..3..2..2
..0..1..1..1..2....0..0..0..2..2....3..0..0..0..1....2..3..3..3..1
..0..0..1..1..1....0..0..2..2..2....3..3..0..0..0....2..2..3..3..3
..0..0..0..1..1....0..2..2..2..1....3..3..3..0..0....2..2..2..3..3
..1..0..0..0..0....1..2..2..0..1....1..3..3..3..3....1..2..2..2..2
CROSSREFS
Sequence in context: A189504 A028540 A347164 * A364182 A034279 A031584
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 04 2012
STATUS
approved