Inverse of A097104.

Terms

a(0) =4a(1) =1a(2) =2a(3) =3a(4) =400a(5) =8a(6) =5a(7) =6a(8) =12a(9) =7a(10) =69a(11) =16a(12) =9a(13) =10a(14) =21a(15) =11a(16) =61a(17) =27a(18) =13a(19) =14a(20) =31a(21) =15a(22) =92a(23) =38a(24) =17a(25) =347a(26) =18a(27) =43a(28) =19a(29) =20