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

Terms

a(0) =0a(1) =1a(2) =7a(3) =48a(4) =329a(5) =2255a(6) =15456a(7) =105937a(8) =726103a(9) =4976784a(10) =34111385a(11) =233802911a(12) =1602508992a(13) =10983760033a(14) =75283811239a(15) =516002918640