a(n) = 8*a(n-1) + a(n-2), starting with a(0) = 1 and a(1) = 4.

A088317

a(n) = 8*a(n-1) + a(n-2), starting with a(0) = 1 and a(1) = 4.

Terms

    a(0) =1a(1) =4a(2) =33a(3) =268a(4) =2177a(5) =17684a(6) =143649a(7) =1166876a(8) =9478657a(9) =76996132a(10) =625447713a(11) =5080577836a(12) =41270070401a(13) =335241141044

External references