Values of x in the solutions to x^2 - 4xy + y^2 + 11 = 0, where 0 < x < y.

Terms

a(0) =2a(1) =3a(2) =5a(3) =10a(4) =18a(5) =37a(6) =67a(7) =138a(8) =250a(9) =515a(10) =933a(11) =1922a(12) =3482a(13) =7173a(14) =12995a(15) =26770a(16) =48498a(17) =99907a(18) =180997a(19) =372858a(20) =675490a(21) =1391525a(22) =2520963a(23) =5193242a(24) =9408362a(25) =19381443a(26) =35112485a(27) =72332530a(28) =131041578a(29) =269948677