Sum of first n primes of form 4k-1.

Terms

a(0) =3a(1) =10a(2) =21a(3) =40a(4) =63a(5) =94a(6) =137a(7) =184a(8) =243a(9) =310a(10) =381a(11) =460a(12) =543a(13) =646a(14) =753a(15) =880a(16) =1011a(17) =1150a(18) =1301a(19) =1464a(20) =1631a(21) =1810a(22) =2001a(23) =2200a(24) =2411a(25) =2634a(26) =2861a(27) =3100a(28) =3351a(29) =3614