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A267717 Number of nX6 0..1 arrays with every repeated value in every row and column greater than the previous repeated value. 1
16, 256, 1080, 4266, 10489, 26906, 54887, 114392, 209470, 385962, 656670, 1114828, 1796644, 2877378, 4446790, 6818296, 10190753, 15108240, 21972963, 31714408, 45087635, 63668368, 88787667, 123106970, 168846792, 230489608, 311557126 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 6 of A267719.

LINKS

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

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=5

..0..1..0..1..0..0....1..1..0..1..0..1....1..0..1..0..1..1....0..1..0..0..1..0

..0..1..0..0..1..0....1..0..1..0..1..1....0..1..0..1..0..0....0..0..1..1..0..1

..1..0..1..1..0..1....0..1..0..0..1..0....1..0..1..0..1..0....1..1..0..1..0..1

..0..1..0..0..1..0....1..0..1..1..0..1....0..1..0..0..1..1....1..0..1..0..1..0

..1..0..1..0..1..1....0..0..1..0..1..0....0..1..0..1..0..0....0..0..1..1..0..1

CROSSREFS

Cf. A267719.

Sequence in context: A207658 A207450 A208552 * A223190 A207469 A207521

Adjacent sequences:  A267714 A267715 A267716 * A267718 A267719 A267720

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 19 2016

STATUS

approved

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Last modified January 22 02:46 EST 2022. Contains 350481 sequences. (Running on oeis4.)