a(n) = (F(6*n+4) - 3)/4, where F=A000045 (the Fibonacci sequence).

A049665

a(n) = (F(6*n+4) - 3)/4, where F=A000045 (the Fibonacci sequence).

Terms

    a(0) =0a(1) =13a(2) =246a(3) =4427a(4) =79452a(5) =1425721a(6) =25583538a(7) =459077975a(8) =8237820024a(9) =147821682469

External references