Numbers X such that X^2 + Y^2 = 3^(2*k) + 1 and X > Y > 0 and k is the ternary digit length of X-1.

Terms

a(0) =3a(1) =9a(2) =21a(3) =27a(4) =71a(5) =81a(6) =195a(7) =233a(8) =243a(9) =711a(10) =729a(11) =1583a(12) =1749a(13) =2157a(14) =2187a(15) =6561a(16) =14829a(17) =15747a(18) =19629a(19) =19683a(20) =57609a(21) =59049a(22) =141717a(23) =154727a(24) =175537a(25) =177147a(26) =385559a(27) =394471a(28) =414649a(29) =422729