A031540 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 42.

1766, 1774, 1782, 1814, 1822, 1826, 1838, 1842, 1858, 1874, 1878, 1886, 1894, 1922, 1926, 1934, 3972, 3981, 3993, 4038, 4101, 4107, 4116, 4143, 4161, 4179, 4188, 4197, 4209, 4254, 4269, 4281, 4287, 4317, 4341, 4353, 7060, 7076, 7108, 7116, 7124, 7132

Offset

1,1

Links

Table of n, a(n) for n=1..42.

Crossrefs

Sequence in context: A343988 A031762 A031672 * A135795 A206201 A237900

Adjacent sequences: A031537 A031538 A031539 * A031541 A031542 A031543

Keyword

nonn

Author

David W. Wilson

Status

approved