Indices of records in A366927.

Terms

a(0) =1a(1) =2a(2) =3a(3) =7a(4) =23a(5) =47a(6) =139a(7) =283a(8) =659a(9) =1319a(10) =8637a(11) =20147a(12) =83491a(13) =169861a(14) =999013a(15) =3797401a(16) =8153567a(17) =55443959a(18) =187814447a(19) =646611887