Values of x such that x^2 + y^2 = 5^n with x and y coprime and 0 < x < y.

Terms

a(0) =1a(1) =3a(2) =2a(3) =7a(4) =38a(5) =44a(6) =29a(7) =336a(8) =718a(9) =237a(10) =2642a(11) =10296a(12) =8839a(13) =16124a(14) =108691a(15) =164833a(16) =24478a(17) =922077a(18) =2521451a(19) =1476984a(20) =6699319a(21) =34182196a(22) =35553398a(23) =32125393a(24) =306268562a(25) =597551756a(26) =130656229a(27) =2465133864a(28) =8701963882a(29) =6890111163