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A102267
Smallest prime for which 2^n exactly divides the class number h(8p) and X^2 - 2pY^2 = -2 is solvable.
0
3, 73, 257, 1217, 23041, 27953, 243137, 1408961
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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:
A259848
A041279
A054699
*
A201038
A142078
A054689
Adjacent sequences:
A102264
A102265
A102266
*
A102268
A102269
A102270
KEYWORD
nonn
,
more
AUTHOR
N. J. A. Sloane
, Feb 19 2005
STATUS
approved
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Last modified April 25 06:14 EDT 2024. Contains 371964 sequences. (Running on oeis4.)