Numbers k such that the continued fraction for sqrt(k) has even period 2*m and the m-th term of the periodic part is 1.

A031404

Numbers k such that the continued fraction for sqrt(k) has even period 2*m and the m-th term of the periodic part is 1.

Terms

    a(0) =3a(1) =7a(2) =8a(3) =15a(4) =24a(5) =32a(6) =35a(7) =48a(8) =63a(9) =75a(10) =80a(11) =88a(12) =91a(13) =99a(14) =115a(15) =120a(16) =135a(17) =136a(18) =143a(19) =168a(20) =175a(21) =176a(22) =195a(23) =208a(24) =215a(25) =224a(26) =247a(27) =255a(28) =279a(29) =280

External references