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 20.
A031518
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 20.
Terms
- a(0) =402a(1) =418a(2) =422a(3) =446a(4) =454a(5) =466a(6) =478a(7) =482a(8) =903a(9) =921a(10) =933a(11) =939a(12) =942a(13) =948a(14) =993a(15) =1014a(16) =1029a(17) =1041a(18) =1047a(19) =1077a(20) =1086a(21) =1604a(22) =1612a(23) =1636a(24) =1644a(25) =1660a(26) =1676a(27) =1684a(28) =1700a(29) =1708
External references
- oeis: A031518