%I #4 Mar 16 2013 17:40:16
%S 2218,55790,2077712,68181369,1978616080,57277247088,1699357454896,
%T 44365723263555,1311475160855472,37755798074253165,1043288642345317846
%N Number of (n+2)X3 0..3 arrays with all rows and columns having a strictly positive second derivative in a quadratic least squares fit
%C Column 1 of A223159
%e Some solutions for n=1
%e ..3..1..1....3..1..2....1..1..2....3..0..3....3..2..2....3..0..3....3..1..3
%e ..2..0..1....2..0..0....0..0..2....0..0..1....1..0..0....1..0..1....2..0..2
%e ..2..1..2....3..0..3....1..1..3....3..1..1....3..0..0....3..2..3....2..0..2
%K nonn
%O 1,1
%A _R. H. Hardin_ Mar 16 2013
