Number of (n+2)X4 0..2 arrays with all rows and columns having a strictly positive second derivative in a quadratic least squares fit.
A223156
Number of (n+2)X4 0..2 arrays with all rows and columns having a strictly positive second derivative in a quadratic least squares fit.
Terms
- a(0) =989a(1) =25929a(2) =1328305a(3) =55977857a(4) =1853983303a(5) =63763662879
External references
- oeis: A223156