A trinomial transform of Fibonacci(3n).

Terms

a(0) =0a(1) =1a(2) =8a(3) =53a(4) =336a(5) =2105a(6) =13144a(7) =81997a(8) =511392a(9) =3189169a(10) =19888040a(11) =124023461a(12) =773419248a(13) =4823095913a(14) =30077155576a(15) =187563189565