A two level sequence: v(n)=2*(If[n == 0, 0, 2^(n - 1)] + 2); a(n)=If[n == 0, 6, (v[n] + v[n - 1] - 2)].

A146529

A two level sequence: v(n)=2*(If[n == 0, 0, 2^(n - 1)] + 2); a(n)=If[n == 0, 6, (v[n] + v[n - 1] - 2)].

Terms

    a(0) =6a(1) =8a(2) =12a(3) =18a(4) =30a(5) =54a(6) =102a(7) =198a(8) =390a(9) =774a(10) =1542a(11) =3078a(12) =6150a(13) =12294a(14) =24582a(15) =49158a(16) =98310a(17) =196614a(18) =393222a(19) =786438a(20) =1572870a(21) =3145734a(22) =6291462a(23) =12582918a(24) =25165830a(25) =50331654a(26) =100663302a(27) =201326598a(28) =402653190a(29) =805306374

External references