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A013647 Period of continued fraction for sqrt(n) contains no 1's. 3
2, 5, 6, 10, 11, 12, 17, 18, 20, 26, 27, 28, 30, 37, 38, 39, 40, 41, 42, 50, 51, 55, 56, 65, 66, 68, 72, 82, 83, 84, 87, 89, 90, 101, 102, 104, 105, 110, 122, 123, 126, 128, 130, 131, 132, 145, 146, 147, 148, 150, 152, 155, 156, 170, 171, 174, 177, 180, 182, 197, 198, 200, 203 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

REFERENCES

Kenneth H. Rosen, Elementary Number Theory and Its Applications, Addison-Wesley, 1984, page 426 (but beware of errors!).

LINKS

T. D. Noe, Table of n, a(n) for n = 1..1000

CROSSREFS

Sequence in context: A244731 A109150 A004202 * A255068 A183987 A187840

Adjacent sequences:  A013644 A013645 A013646 * A013648 A013649 A013650

KEYWORD

nonn

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified March 21 10:13 EDT 2019. Contains 321368 sequences. (Running on oeis4.)