130224

Appears in sequences

• a(n) = 16*a(n-1) - 62*a(n-2) for n>1, a(0)=1, a(1)=12.at n=5A163414
• Number of (n+2)X1 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.at n=6A223492