Numbers n such that n^2 - 1 is expressible as the sum of two nonzero squares in exactly one way.

Terms

a(0) =3a(1) =9a(2) =17a(3) =19a(4) =33a(5) =35a(6) =73a(7) =145a(8) =161a(9) =163a(10) =195a(11) =243a(12) =393a(13) =483a(14) =513a(15) =721a(16) =723a(17) =1153a(18) =1763a(19) =2177a(20) =2305a(21) =2593a(22) =4803a(23) =5185a(24) =5833a(25) =6273a(26) =6963a(27) =7057a(28) =7395a(29) =8713