Number of nX3 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.
A223190
Number of nX3 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.
Terms
- a(0) =16a(1) =256a(2) =1138a(3) =20016a(4) =252544a(5) =3407893a(6) =52906752a(7) =807057750a(8) =12038960562a(9) =208858564343
External references
- oeis: A223190