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A267786
Number of nX6 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
51, 2601, 22110, 211555, 912667, 4245574, 13126812, 42012357, 106570618, 272337497, 604928942, 1330976409, 2684633348, 5309403837, 9945849384, 18160668025, 32072067434, 55037496090, 92610159756, 151216855067
OFFSET
1,1
COMMENTS
Column 6 of A267788.
LINKS
FORMULA
Empirical: a(n) = 2*a(n-1) +10*a(n-2) -22*a(n-3) -44*a(n-4) +110*a(n-5) +110*a(n-6) -330*a(n-7) -165*a(n-8) +660*a(n-9) +132*a(n-10) -924*a(n-11) +924*a(n-13) -132*a(n-14) -660*a(n-15) +165*a(n-16) +330*a(n-17) -110*a(n-18) -110*a(n-19) +44*a(n-20) +22*a(n-21) -10*a(n-22) -2*a(n-23) +a(n-24) for n>27
EXAMPLE
Some solutions for n=3
..1..1..0..1..1..1....0..1..0..0..1..1....0..0..1..0..1..1....0..1..1..1..1..0
..0..0..1..0..0..0....1..0..1..0..1..0....1..1..0..1..1..0....0..0..0..0..1..0
..0..0..1..1..1..1....1..1..1..1..0..1....1..0..1..0..0..0....1..0..1..0..0..1
CROSSREFS
Cf. A267788.
Sequence in context: A210080 A218752 A097836 * A267733 A238603 A128917
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 20 2016
STATUS
approved