Numerator of the contraharmonic mean of the first n primes.

Terms

a(0) =2a(1) =13a(2) =19a(3) =87a(4) =52a(5) =377a(6) =333a(7) =1027a(8) =389a(9) =799a(10) =1679a(11) =4727a(12) =3204a(13) =8257a(14) =5233a(15) =4425a(16) =4189a(17) =20477a(18) =12483a(19) =30007a(20) =4417a(21) =41577a(22) =24233a(23) =56387a(24) =16449a(25) =75997a(26) =43303a(27) =32685a(28) =13742a(29) =122705