Partial sums of regular primes A007703.

Terms

a(0) =3a(1) =8a(2) =15a(3) =26a(4) =39a(5) =56a(6) =75a(7) =98a(8) =127a(9) =158a(10) =199a(11) =242a(12) =289a(13) =342a(14) =403a(15) =474a(16) =547a(17) =626a(18) =709a(19) =798a(20) =895a(21) =1002a(22) =1111a(23) =1224a(24) =1351a(25) =1488a(26) =1627a(27) =1778a(28) =1941a(29) =2108