a(2n) = a(n) + a(n+1), a(2n+1) = 2a(n+1), if n >= 2.

Terms

a(0) =1a(1) =2a(2) =4a(3) =6a(4) =10a(5) =12a(6) =16a(7) =20a(8) =22a(9) =24a(10) =28a(11) =32a(12) =36a(13) =40a(14) =42a(15) =44a(16) =46a(17) =48a(18) =52a(19) =56a(20) =60a(21) =64a(22) =68a(23) =72a(24) =76a(25) =80a(26) =82a(27) =84a(28) =86a(29) =88