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A223650
Number of (n+2)X6 0..1 arrays with all rows having a nonnegative second derivative, and all and columns having a positive second derivative in a quadratic least squares fit, with one and two element arrays taken as having a zero second derivative
0
207, 3237, 427313, 22982345, 1119629805, 50246141433, 2434395476789, 75307144658325, 3271323310834015
OFFSET
1,1
COMMENTS
Column 6 of A223652
EXAMPLE
Some solutions for n=3
..1..0..1..1..1..1....1..0..1..1..1..1....1..1..1..0..0..1....1..1..0..0..1..1
..0..0..0..0..0..1....0..0..0..0..0..0....0..0..0..0..0..0....0..0..0..0..0..0
..1..0..0..1..1..0....1..0..0..0..1..0....1..1..1..0..0..0....1..0..0..0..1..0
..0..0..1..0..0..1....1..0..0..1..0..0....0..0..0..0..0..0....1..0..0..1..0..0
..1..1..0..1..1..1....1..1..0..1..1..1....1..1..1..1..1..1....1..1..1..1..1..1
CROSSREFS
Sequence in context: A205198 A205194 A204868 * A232346 A052093 A103477
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 25 2013
STATUS
approved