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A207296 Number of (n+1)X3 0..3 arrays with rows and columns of determinants of all 2X2 subblocks lexicographically nondecreasing 1
2338, 93991, 2019514, 33860323, 521236935, 8125554503, 129766993681, 2097529018861, 34031232967856, 552743117801949, 8980781167531052, 145936287642008829, 2371573852386690882, 38540844929539700726 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 2 of A207300
LINKS
FORMULA
Empirical: a(n) = 24*a(n-1) -102*a(n-2) -656*a(n-3) +4911*a(n-4) -9576*a(n-5) +5400*a(n-6) for n>28
EXAMPLE
Some solutions for n=4
..3..3..3....3..0..0....0..2..2....1..1..3....0..0..1....2..3..2....2..1..1
..2..0..0....2..0..1....1..1..0....3..0..0....0..0..3....0..0..0....0..0..0
..3..0..3....0..0..2....1..1..2....0..0..3....3..0..0....3..2..3....3..1..3
..2..1..0....1..0..0....2..3..0....2..0..3....3..0..1....0..0..0....3..1..3
..2..3..3....1..0..2....0..1..1....3..0..1....1..0..3....2..3..0....3..1..3
CROSSREFS
Sequence in context: A237387 A212466 A205021 * A043440 A023938 A132204
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 16 2012
STATUS
approved

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Last modified June 15 01:31 EDT 2024. Contains 373402 sequences. (Running on oeis4.)