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A204414 Number of (n+2)X7 0..2 arrays with every 3X3 subblock having three strictly increasing elements in a row horizontally or vertically, exactly one way 1
22956524, 52039032, 49914501, 89459577, 253954944, 1364559057, 8802512928, 94119917760, 799779768057, 5157529409520, 54442875220704, 461709627045696, 2975903003844864, 31413452974221312, 266406358593250368 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 5 of A204417
LINKS
FORMULA
Empirical: a(n) = 577*a(n-3) for n>16
EXAMPLE
Some solutions for n=3
..0..0..2..2..2..0..2....2..0..1..1..0..0..1....1..0..0..1..1..0..0
..1..0..1..2..0..1..0....2..1..0..1..1..0..1....0..1..1..0..1..1..0
..2..0..0..1..2..2..1....0..2..1..0..2..1..1....2..0..2..1..0..2..1
..0..1..2..0..1..2..2....0..2..2..1..1..2..1....0..1..2..2..1..1..2
..2..0..1..2..0..1..2....0..1..2..2..0..1..2....1..0..1..2..2..0..0
CROSSREFS
Sequence in context: A238154 A069377 A235931 * A114666 A157079 A321065
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 15 2012
STATUS
approved

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Last modified April 23 00:50 EDT 2024. Contains 371906 sequences. (Running on oeis4.)