login

Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.

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
OFFSET
1,1
COMMENTS
Column 6 of A267719.
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=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
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 19 2016
STATUS
approved