a(n) = ((4+3*sqrt(2))*(4+sqrt(2))^n + (4-3*sqrt(2))*(4-sqrt(2))^n)/4.

A164034

a(n) = ((4+3*sqrt(2))*(4+sqrt(2))^n + (4-3*sqrt(2))*(4-sqrt(2))^n)/4.

Terms

    a(0) =2a(1) =11a(2) =60a(3) =326a(4) =1768a(5) =9580a(6) =51888a(7) =280984a(8) =1521440a(9) =8237744a(10) =44601792a(11) =241485920a(12) =1307462272a(13) =7078895296a(14) =38326690560a(15) =207508990336

External references