Least k such that the sum of the distinct prime divisors of k equals m^n for some m > 1.

Terms

a(0) =2a(1) =14a(2) =15a(3) =39a(4) =87a(5) =183a(6) =2071a(7) =1255a(8) =1527a(9) =3063a(10) =28546a(11) =12279a(12) =106327a(13) =49143a(14) =622231a(15) =1113823a(16) =1703767a(17) =1310695a(18) =9961111a(19) =3145719a(20) =29360002a(21) =12582903a(22) =218103418a(23) =50331639a(24) =2046816631a(25) =335544295a(26) =9932108986a(27) =23890747663a(28) =1610612727