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A102265
Smallest prime for which 2^n exactly divides the class number h(8p) and X^2 - 2pY^2 = -1 is solvable.
1
5, 41, 113, 3089, 12641, 50753, 675569, 1410977
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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:
A139846
A201718
A142101
*
A337393
A262340
A128347
Adjacent sequences:
A102262
A102263
A102264
*
A102266
A102267
A102268
KEYWORD
nonn
,
more
AUTHOR
N. J. A. Sloane
, Feb 19 2005
STATUS
approved
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Last modified August 18 19:26 EDT 2024. Contains 375273 sequences. (Running on oeis4.)