|
%I #3 Mar 18 2013 05:44:07
%S 1143,1306449,52906752,76015542500,49198404222036,36214510060655577,
%T 36869649918720635277
%N Number of nX7 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
%C Column 7 of A223195
%e Some solutions for n=3
%e ..0..0..0..2..0..1..2....0..0..0..1..2..2..2....0..0..1..0..2..2..2
%e ..0..0..0..1..0..1..1....0..0..0..0..1..1..2....0..0..0..0..0..1..0
%e ..2..0..0..2..0..2..1....0..0..0..0..1..1..2....2..0..0..2..0..2..0
%K nonn
%O 1,1
%A _R. H. Hardin_ Mar 18 2013
| 