Number of (n+2)X3 0..3 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.
A223494
Number of (n+2)X3 0..3 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.
Terms
- a(0) =5264a(1) =172262a(2) =7974566a(3) =332428881a(4) =12184078320a(5) =451243568715
External references
- oeis: A223494