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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

R. H. Hardin, Table of n, a(n) for n = 1..210

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

Adjacent sequences:  A207293 A207294 A207295 * A207297 A207298 A207299

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 16 2012

STATUS

approved

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Last modified May 21 03:31 EDT 2022. Contains 353887 sequences. (Running on oeis4.)