a(n) = sum(i=1,n)(i-th i-almost prime). Cumulative sums of A101695.

Terms

a(0) =2a(1) =8a(2) =26a(3) =66a(4) =174a(5) =398a(6) =878a(7) =2174a(8) =4862a(9) =10494a(10) =22014a(11) =45054a(12) =98302a(13) =222718a(14) =480766a(15) =1021438a(16) =2127358a(17) =4355582a(18) =8943102a(19) =18773502a(20) =38696446a(21) =79590910a(22) =175142398a(23) =368080382a(24) =764442110a(25) =1586525694a(26) =3247470078a(27) =6644856318a(28) =13489960446