a(n) = Sum_{p|n, p prime} p^pi(p).

Terms

a(0) =0a(1) =2a(2) =9a(3) =2a(4) =125a(5) =11a(6) =2401a(7) =2a(8) =9a(9) =127a(10) =161051a(11) =11a(12) =4826809a(13) =2403a(14) =134a(15) =2a(16) =410338673a(17) =11a(18) =16983563041a(19) =127a(20) =2410a(21) =161053a(23) =11a(24) =125a(25) =4826811a(26) =9a(27) =2403a(29) =136a(31) =2a(32) =161060