Numerator of the average distance among first n primes.

Terms

a(0) =1a(1) =2a(2) =17a(3) =22a(4) =27a(5) =142a(6) =31a(7) =9a(8) =97a(9) =666a(10) =83a(11) =604a(12) =1529a(13) =1906a(14) =791a(15) =367a(16) =3533a(17) =4238a(18) =5019a(19) =584a(20) =617a(21) =7822a(22) =8995a(23) =518a(24) =473a(25) =13342a(26) =1663a(27) =8324a(28) =3689a(29) =20662