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

Terms

a(0) =5a(1) =18a(2) =35a(3) =64a(4) =101a(5) =142a(6) =195a(7) =256a(8) =329a(9) =418a(10) =515a(11) =616a(12) =725a(13) =838a(14) =975a(15) =1124a(16) =1281a(17) =1454a(18) =1635a(19) =1828a(20) =2025a(21) =2254a(22) =2487a(23) =2728a(24) =2985a(25) =3254a(26) =3531a(27) =3812a(28) =4105a(29) =4418