A102266 Smallest prime for which 2^n exactly divides the class number h(8p) and X^2 - 2pY^2 = 2 is solvable.

7, 17, 337, 3361, 25409, 120977, 206081, 1566449

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