Subsequence of Pythagorean primes (A002144): each square is used only once.

Terms

a(0) =5a(1) =41a(2) =73a(3) =149a(4) =157a(5) =277a(6) =313a(7) =613a(8) =617a(9) =709a(10) =929a(11) =1117a(12) =1201a(13) =1741a(14) =1753a(15) =1873a(16) =2381a(17) =2897a(18) =2969a(19) =3469a(20) =3613a(21) =3637a(22) =3697a(23) =4513a(24) =4597a(25) =5101a(26) =5953a(27) =6173a(28) =6857a(29) =6869