Index of first occurrence of n in A109883, or -1 if n does not occur in A109883.

Terms

a(0) =1a(1) =2a(2) =3a(3) =30a(4) =5a(5) =9a(6) =7a(7) =50a(8) =20a(9) =42a(10) =11a(11) =36a(12) =13a(13) =6510a(14) =27a(15) =54a(16) =17a(17) =70620a(18) =19a(19) =25a(20) =46a(21) =66a(22) =23a(23) =168630a(24) =124a(25) =98a(26) =58a(27) =78a(28) =29