Sum of the 7th powers of the primes dividing n.

Terms

a(0) =0a(1) =128a(2) =2187a(3) =128a(4) =78125a(5) =2315a(6) =823543a(7) =128a(8) =2187a(9) =78253a(10) =19487171a(11) =2315a(12) =62748517a(13) =823671a(14) =80312a(15) =128a(16) =410338673a(17) =2315a(18) =893871739a(19) =78253a(20) =825730a(21) =19487299a(22) =3404825447a(23) =2315a(24) =78125a(25) =62748645a(26) =2187a(27) =823671a(28) =17249876309a(29) =80440