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 19.
A031517
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 19.
Terms
- a(0) =363a(1) =367a(2) =379a(3) =383a(4) =387a(5) =391a(6) =411a(7) =419a(8) =431a(9) =439a(10) =1448a(11) =1480a(12) =1536a(13) =1568a(14) =1576a(15) =1632a(16) =1664a(17) =1696a(18) =1728a(19) =1760a(20) =3255a(21) =3327a(22) =3387a(23) =3543a(24) =3687a(25) =3747a(26) =3759a(27) =3819a(28) =3831a(29) =3903
External references
- oeis: A031517