a(n) is the smallest number k such that k*n is a term of A072873.

Terms

a(0) =1a(1) =2a(2) =9a(3) =1a(4) =625a(5) =18a(6) =117649a(7) =2a(8) =3a(9) =1250a(10) =25937424601a(11) =9a(13) =235298a(14) =5625a(15) =1a(17) =6a(19) =625a(20) =1058841a(21) =51874849202a(23) =18a(24) =125a(26) =1a(27) =117649