Number of (n+2)X4 0..1 arrays with all rows and columns having a strictly positive second derivative in a quadratic least squares fit.
A223176
Number of (n+2)X4 0..1 arrays with all rows and columns having a strictly positive second derivative in a quadratic least squares fit.
Terms
- a(0) =0a(1) =4a(2) =40a(3) =348a(4) =1200a(5) =16348a(6) =94364a(7) =524292a(8) =2621432a(9) =16536796a(10) =84487288a(11) =391704968a(12) =2328596100a(13) =11355881256a(14) =62051315756a(15) =313489275420
External references
- oeis: A223176