Values of the exponents in A084435.

Terms

a(0) =0a(1) =1a(2) =2a(3) =1a(4) =5a(5) =1a(6) =1a(7) =29a(8) =3a(9) =37a(10) =31a(11) =227a(12) =835a(13) =115a(14) =7615a(15) =6071a(16) =218431