k such that A035312(k-1) = n or 0 if there is none.

Terms

a(0) =1a(1) =2a(2) =3a(3) =4a(4) =11a(5) =5a(6) =7a(7) =16a(8) =6a(9) =22a(10) =8a(11) =12a(12) =17a(13) =29a(14) =37a(15) =56a(16) =9a(17) =23a(18) =46a(19) =67a(20) =79a(21) =92a(22) =13a(23) =30a(24) =18a(25) =10a(26) =106a(27) =137a(28) =38a(29) =121