Positions of primes in A004431 (sums of 2 distinct nonzero squares).

Terms

a(0) =1a(1) =3a(2) =4a(3) =8a(4) =10a(5) =12a(6) =16a(7) =18a(8) =21a(9) =26a(10) =28a(11) =30a(12) =33a(13) =34a(14) =41a(15) =45a(16) =47a(17) =52a(18) =55a(19) =57a(20) =59a(21) =69a(22) =71a(23) =73a(24) =77a(25) =81a(26) =84a(27) =85a(28) =89a(29) =94