Indices of records of A232928.

Terms

a(0) =3a(1) =4a(2) =6a(3) =12a(4) =20a(5) =24a(6) =70a(7) =714a(8) =1364a(9) =2706a(10) =26220a(11) =53570a(12) =67044a(13) =164220a(14) =5053620a(15) =60369855a(16) =191895456a(17) =475528443a(18) =715236599