a(n) = 12*a(n-1) - 33*a(n-2) for n > 1; a(0) = 4, a(1) = 27.

A164311

a(n) = 12*a(n-1) - 33*a(n-2) for n > 1; a(0) = 4, a(1) = 27.

Terms

    a(0) =4a(1) =27a(2) =192a(3) =1413a(4) =10620a(5) =80811a(6) =619272a(7) =4764501a(8) =36738036a(9) =283627899a(10) =2191179600a(11) =16934434533a(12) =130904287596

External references