a(n) = A019565(n) - 1.

Terms

a(0) =0a(1) =1a(2) =2a(3) =5a(4) =4a(5) =9a(6) =14a(7) =29a(8) =6a(9) =13a(10) =20a(11) =41a(12) =34a(13) =69a(14) =104a(15) =209a(16) =10a(17) =21a(18) =32a(19) =65a(20) =54a(21) =109a(22) =164a(23) =329a(24) =76a(25) =153a(26) =230a(27) =461a(28) =384a(29) =769