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A267730
Number of nX3 0..1 arrays with every repeated value in every row and column greater than or equal to the previous repeated value.
1
8, 64, 512, 3375, 21952, 132651, 778688, 4410944, 24389000, 131872229, 700227072, 3659383421, 18863581528, 96071912000, 484106454208, 2416353439059, 11958715956032, 58732317850311, 286451826688000, 1388285542167616
OFFSET
1,1
COMMENTS
Column 3 of A267735.
LINKS
FORMULA
Empirical: a(n) = 12*a(n-1) -30*a(n-2) -120*a(n-3) +455*a(n-4) +576*a(n-5) -2142*a(n-6) -1980*a(n-7) +3180*a(n-8) +1980*a(n-9) -2142*a(n-10) -576*a(n-11) +455*a(n-12) +120*a(n-13) -30*a(n-14) -12*a(n-15) -a(n-16)
EXAMPLE
Some solutions for n=4
..0..0..1....1..0..1....1..1..1....0..0..0....0..1..0....1..0..1....1..1..1
..0..1..0....1..1..1....1..0..0....0..1..0....0..0..1....0..1..1....0..0..0
..1..1..0....0..0..0....1..0..1....1..0..0....0..0..0....0..0..1....1..1..1
..1..1..0....1..1..1....0..0..0....1..0..1....0..0..1....0..1..0....0..0..1
CROSSREFS
Cf. A267735.
Sequence in context: A125498 A193539 A228739 * A189155 A189337 A262335
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 20 2016
STATUS
approved