Number of 3Xn 0..2 arrays with all rows having a nonnegative second derivative, and all 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.
A223392
Number of 3Xn 0..2 arrays with all rows having a nonnegative second derivative, and all 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) =11a(1) =121a(2) =388a(3) =4794a(4) =40416a(5) =375698a(6) =4128762a(7) =41424210a(8) =415135608a(9) =4912230456a(10) =49929186692a(11) =536801738054
External references
- oeis: A223392