Numbers k such that the periodic part of the continued fraction for sqrt(k) contains a single 1.

Terms

a(0) =3a(1) =8a(2) =15a(3) =24a(4) =35a(5) =48a(6) =63a(7) =80a(8) =99a(9) =120a(10) =143a(11) =168a(12) =175a(13) =176a(14) =195a(15) =208a(16) =224a(17) =255a(18) =288a(19) =323a(20) =360a(21) =399a(22) =440a(23) =483a(24) =528a(25) =551a(26) =575a(27) =624a(28) =675a(29) =728