a(n) = prime(k+1) with k = n^2 + prime(n)^2.

Terms

a(0) =13a(1) =43a(2) =149a(3) =317a(4) =853a(5) =1277a(6) =2281a(7) =2957a(8) =4507a(9) =7433a(10) =8693a(11) =12671a(12) =15887a(13) =17839a(14) =21701a(15) =28099a(16) =35407a(17) =38327a(18) =46997a(19) =53359a(20) =56911a(21) =67511a(22) =75289a(23) =87541a(24) =105173a(25) =115067a(26) =120473a(27) =130829a(28) =136573a(29) =147919