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A267789 Number of 3Xn 0..1 arrays with every repeated value in every row greater than or equal to, and in every column greater than, the previous repeated value. 1
6, 36, 216, 1056, 5004, 22110, 94554, 391314, 1582824, 6278400, 24520080, 94523100, 360449622, 1361930880, 5105718624, 19011717024, 70378031196, 259193957658, 950281765146, 3470120581542, 12626754295920, 45799000309176 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Row 3 of A267788.
LINKS
FORMULA
Empirical: a(n) = 8*a(n-1) -12*a(n-2) -40*a(n-3) +80*a(n-4) +100*a(n-5) -134*a(n-6) -160*a(n-7) +8*a(n-8) +48*a(n-9) +8*a(n-10) -4*a(n-11) -a(n-12)
EXAMPLE
Some solutions for n=4
..0..0..1..0....0..1..0..1....0..0..1..1....0..1..0..1....1..1..0..1
..0..1..1..1....1..0..1..1....1..1..1..1....1..0..1..0....1..0..1..1
..1..0..0..0....1..0..1..0....1..0..0..0....0..0..0..1....0..1..1..0
CROSSREFS
Cf. A267788.
Sequence in context: A216127 A337970 A124535 * A228737 A007274 A269616
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 20 2016
STATUS
approved

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Last modified March 29 06:34 EDT 2024. Contains 371265 sequences. (Running on oeis4.)