Number of 5Xn 0..1 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.
A223655
Number of 5Xn 0..1 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) =13a(1) =169a(2) =343a(3) =5751a(4) =40981a(5) =427313a(6) =4854187a(7) =44756637a(8) =495471093a(9) =7057443515a(10) =81567865207a(11) =907308467643
External references
- oeis: A223655