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A102264
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Smallest prime for which 2^n exactly divides the class number h(-4p).
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0
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5, 17, 41, 257, 521, 4481, 9521, 21929, 72089, 531977, 1256009, 5014169, 20879129, 70993529, 258844361, 866941841, 3771185921
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OFFSET
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1,1
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LINKS
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PROG
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(Sage)
def a(n):
for p in Primes():
if QuadraticField(-p).class_number().valuation(2)==n:
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CROSSREFS
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KEYWORD
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nonn,more
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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