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

Terms

a(0) =7a(1) =37a(2) =137a(3) =311a(4) =829a(5) =1249a(6) =2269a(7) =2939a(8) =4483a(9) =7411a(10) =8681a(11) =12653a(12) =15877a(13) =17827a(14) =21673a(15) =28087a(16) =35393a(17) =38317a(18) =46957a(19) =53327a(20) =56897a(21) =67493a(22) =75269a(23) =87523a(24) =105143a(25) =115057a(26) =120427a(27) =130811a(28) =136547a(29) =147863