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A102266 Smallest prime for which 2^n exactly divides the class number h(8p) and X^2 - 2pY^2 = 2 is solvable. 1
7, 17, 337, 3361, 25409, 120977, 206081, 1566449 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..8.

H. Cohn and J. C. Lagarias, On the existence of fields governing the 2-invariants of the classgroup of Q(sqrt{dp}) as p varies, Math. Comp. 41 (1983), 711-730.

CROSSREFS

Sequence in context: A077715 A089563 A159028 * A113765 A269447 A013540

Adjacent sequences:  A102263 A102264 A102265 * A102267 A102268 A102269

KEYWORD

nonn,more

AUTHOR

N. J. A. Sloane, Feb 19 2005

STATUS

approved

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Last modified May 18 03:30 EDT 2022. Contains 353783 sequences. (Running on oeis4.)