Fibonacci sequence beginning 0, 6.

Terms

a(0) =0a(1) =6a(2) =6a(3) =12a(4) =18a(5) =30a(6) =48a(7) =78a(8) =126a(9) =204a(10) =330a(11) =534a(12) =864a(13) =1398a(14) =2262a(15) =3660a(16) =5922a(17) =9582a(18) =15504a(19) =25086a(20) =40590a(21) =65676a(22) =106266a(23) =171942a(24) =278208a(25) =450150a(26) =728358a(27) =1178508a(28) =1906866a(29) =3085374