a(0)=1, a(1)=1, a(n)=7*a(n/2) for n=2,4,6,..., a(n)=6*a((n-1)/2)+a((n+1)/2) for n=3,5,7,....

Terms

a(0) =0a(1) =1a(2) =7a(3) =13a(4) =49a(5) =55a(6) =91a(7) =127a(8) =343a(9) =349a(10) =385a(11) =421a(12) =637a(13) =673a(14) =889a(15) =1105a(16) =2401a(17) =2407a(18) =2443a(19) =2479a(20) =2695a(21) =2731a(22) =2947a(23) =3163a(24) =4459a(25) =4495a(26) =4711a(27) =4927a(28) =6223a(29) =6439