a(n) = A322244(n)^2, the square of the central coefficient in (1 + 3*x + 16x^2)^n.

A322245

a(n) = A322244(n)^2, the square of the central coefficient in (1 + 3*x + 16x^2)^n.

Terms

    a(0) =1a(1) =9a(2) =1681a(3) =99225a(4) =11189025a(5) =1019077929a(6) =108167974321

External references