a(n) = a(n-1) + a(n-2) + 5 where a(0) = a(1) = 1.

Terms

a(0) =1a(1) =1a(2) =7a(3) =13a(4) =25a(5) =43a(6) =73a(7) =121a(8) =199a(9) =325a(10) =529a(11) =859a(12) =1393a(13) =2257a(14) =3655a(15) =5917a(16) =9577a(17) =15499a(18) =25081a(19) =40585a(20) =65671a(21) =106261a(22) =171937a(23) =278203a(24) =450145a(25) =728353a(26) =1178503a(27) =1906861a(28) =3085369a(29) =4992235