a(n) = 7*a(n-1) - 5*a(n-2), with a(0)=0, a(1)=1.

Terms

a(0) =0a(1) =1a(2) =7a(3) =44a(4) =273a(5) =1691a(6) =10472a(7) =64849a(8) =401583a(9) =2486836a(10) =15399937a(11) =95365379a(12) =590557968a(13) =3657078881a(14) =22646762327a(15) =140241941884a(16) =868459781553