a(n) = 20*a(n-1) - 64*a(n-2) for n > 1; a(0) = 1, a(1) = 19.

A166965

a(n) = 20*a(n-1) - 64*a(n-2) for n > 1; a(0) = 1, a(1) = 19.

Terms

    a(0) =1a(1) =19a(2) =316a(3) =5104a(4) =81856a(5) =1310464a(6) =20970496a(7) =335540224a(8) =5368692736a(9) =85899280384

External references