Numbers k such that the continued fraction for sqrt(k) has even period and if the last term of the periodic part is deleted the central term is 11.
A031509
Numbers k such that the continued fraction for sqrt(k) has even period and if the last term of the periodic part is deleted the central term is 11.
Terms
- a(0) =123a(1) =127a(2) =131a(3) =139a(4) =151a(5) =163a(6) =167a(7) =488a(8) =512a(9) =520a(10) =544a(11) =608a(12) =640a(13) =672a(14) =1095a(15) =1167a(16) =1383a(17) =1455a(18) =1515a(19) =1944a(20) =2008a(21) =2136a(22) =2264a(23) =2456a(24) =2648a(25) =2696a(26) =3035a(27) =3115a(28) =3215a(29) =3235
External references
- oeis: A031509