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A223192
Number of nX5 0..2 arrays with all rows and columns having a nonnegative second derivative in a quadratic least squares fit, with one and two element arrays taken as having a zero second derivative
0
138, 19044, 252544, 41164952, 3815358480, 386807892609, 49198404222036, 6403019500770522
OFFSET
1,1
COMMENTS
Column 5 of A223195
EXAMPLE
Some solutions for n=3
..1..2..0..2..2....1..1..1..0..1....0..1..0..0..2....1..1..0..2..2
..0..1..1..0..2....0..0..0..0..0....1..0..1..0..0....1..1..0..0..1
..1..0..2..1..2....1..0..0..2..0....2..2..2..2..2....1..2..1..1..2
CROSSREFS
Sequence in context: A279964 A163693 A089518 * A199839 A005447 A261703
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 18 2013
STATUS
approved