Indices of records in A389240.

Terms

a(0) =1a(1) =2a(2) =3a(3) =5a(4) =10a(5) =13a(6) =26a(7) =52a(8) =61a(9) =122a(10) =244a(11) =381a(12) =762a(13) =1021a(14) =2042a(15) =4084a(16) =8168a(17) =16336a(18) =32672a(19) =65344a(20) =130688a(21) =261376a(22) =522752a(23) =1045504a(24) =2091008a(25) =3145725a(26) =6291450a(27) =12582900a(28) =25165800a(29) =50331600