a(n) = 20*a(n-1) - 64*a(n-2) for n > 1; a(0) = 1, a(1) = 20.

A166984

a(n) = 20*a(n-1) - 64*a(n-2) for n > 1; a(0) = 1, a(1) = 20.

Terms

    a(0) =1a(1) =20a(2) =336a(3) =5440a(4) =87296a(5) =1397760a(6) =22368256a(7) =357908480a(8) =5726601216a(9) =91625881600

External references