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A204415
Number of (n+2)X8 0..2 arrays with every 3X3 subblock having three strictly increasing elements in a row horizontally or vertically, exactly one way
1
254913953, 395943745, 422397021, 1122887052, 1364559057, 2050960896, 13168291392, 115434720000, 978463169280, 8406274955328, 67649125363200, 567027453966336, 4851531476034048, 39033529900574976, 327172939042111488
OFFSET
1,1
COMMENTS
Column 6 of A204417
LINKS
FORMULA
Empirical: a(n) = 577*a(n-3) for n>17
EXAMPLE
Some solutions for n=3
..0..1..2..0..1..0..2..0....2..1..0..0..0..0..0..1....2..1..1..1..0..2..2..0
..2..0..1..2..1..1..0..1....1..0..1..0..0..1..0..0....0..1..2..0..1..0..1..1
..0..1..0..1..2..2..1..0....1..1..2..1..0..2..1..1....0..0..1..2..2..1..0..2
..0..1..2..0..1..2..2..1....0..1..2..2..1..1..2..1....2..0..0..1..2..2..1..2
..0..0..1..2..0..1..2..2....0..0..1..2..2..0..1..2....0..1..2..0..1..2..2..1
CROSSREFS
Sequence in context: A119860 A210683 A271111 * A246224 A205934 A375975
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 15 2012
STATUS
approved