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A033317 Smallest integer y satisfying Pell equation x^2-ny^2=1 for nonsquare n. 7
2, 1, 4, 2, 3, 1, 6, 3, 2, 180, 4, 1, 8, 4, 39, 2, 12, 42, 5, 1, 10, 5, 24, 1820, 2, 273, 3, 4, 6, 1, 12, 6, 4, 3, 320, 2, 531, 30, 24, 3588, 7, 1, 14, 7, 90, 9100, 66, 12, 2, 20, 2574, 69, 4, 226153980, 8, 1, 16, 8, 5967, 4, 936, 30, 413, 2, 267000, 430, 3, 6630, 40, 6, 9 (list; graph; refs; listen; history; internal format)
OFFSET

1,1

REFERENCES

Laurent Beeckmans, Am. Math. Monthly, Volume 101, Number 5, page 442, May '94.

LINKS

S. R. Finch, Class number theory

Eric Weisstein's World of Mathematics, Pell Equation

Charles R Greathouse IV, Table of n, a(n) for n = 1..10000

CROSSREFS

Cf. A033313.

Sequence in context: A153281 A130584 A078458 * A183200 A007733 A128520

Adjacent sequences:  A033314 A033315 A033316 * A033318 A033319 A033320

KEYWORD

nonn

AUTHOR

Eric Weisstein (eric(AT)weisstein.com)

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Last modified February 17 00:09 EST 2012. Contains 205978 sequences.