Let p = n-th prime == 7 mod 8; a(n) = sum of quadratic residues mod p that are < p/2.

Terms

a(0) =3a(1) =33a(2) =60a(3) =138a(4) =315a(5) =390a(6) =663a(7) =1008a(8) =1425a(9) =1743a(10) =2280a(11) =2475a(12) =3108a(13) =3570a(14) =4323a(15) =4590a(16) =6045a(17) =8055a(18) =8418a(19) =9168a(20) =11610a(21) =12045a(22) =13398a(23) =14340a(24) =14823a(25) =15813a(26) =22425a(27) =23028a(28) =24885a(29) =26163