A031429 Least term in period of continued fraction for sqrt(n) is 5.

27, 104, 231, 408, 635, 795, 912, 1167, 1239, 1616, 1866, 2043, 2134, 2520, 2621, 3047, 3158, 3387, 3504, 3624, 4251, 4515, 4927, 4928, 5358, 5655, 6432, 7259, 7779, 8136, 9062, 9063, 9833, 9840, 10040, 10241, 10650, 11067, 11491, 12144

Offset

1,1

Links

Charles R Greathouse IV, Table of n, a(n) for n = 1..10000 (first 300 terms from Vincenzo Librandi)

Mathematica

Select[Range[15000], !IntegerQ[Sqrt[#]] && Min[ContinuedFraction[Sqrt[#]][[2]]] == 5&] (* Vincenzo Librandi, Feb 07 2012 *)

Crossrefs

Sequence in context: A010015 A256646 A323034 * A154377 A232283 A036923

Adjacent sequences: A031426 A031427 A031428 * A031430 A031431 A031432

Keyword

nonn

Author

David W. Wilson

Status

approved