a(n) = Sum_{k=1..n} n^Omega(k).

Terms

a(0) =1a(1) =3a(2) =7a(3) =25a(4) =41a(5) =91a(6) =127a(7) =673a(8) =1009a(9) =1441a(10) =1871a(11) =4093a(12) =5149a(13) =6553a(14) =8191a(15) =75361a(16) =95201a(17) =124543a(18) =153217a(19) =194561a(20) =234781a(21) =280897a(22) =332949a(23) =723673a(24) =849601a(25) =991251a(26) =1168831a(27) =1369117a(28) =1569597a(29) =1818301