Positions of primes in A000404 (sums of 2 nonzero squares).

Terms

a(0) =1a(1) =2a(2) =5a(3) =6a(4) =11a(5) =14a(6) =16a(7) =20a(8) =22a(9) =26a(10) =31a(11) =33a(12) =36a(13) =39a(14) =40a(15) =48a(16) =52a(17) =54a(18) =60a(19) =63a(20) =65a(21) =67a(22) =77a(23) =79a(24) =81a(25) =86a(26) =90a(27) =93a(28) =94a(29) =99