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A014599 Class numbers h(D) of imaginary quadratic fields with discriminant D=1-4*n. +0
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1, 1, 1, 2, 1, 3, 1, 3, 2, 4, 1, 5, 2, 4, 3, 4, 1, 7, 2, 5, 3, 6, 2, 8, 2, 5, 3, 8, 2, 10, 2, 5, 5, 6, 3, 10, 2, 7, 4, 10, 1, 11, 4, 6, 5, 8, 2, 13, 4, 9, 4, 6, 3, 14, 4, 7, 5, 12, 2, 15, 3, 6, 7, 12, 4, 13, 2, 11, 4, 12, 3, 14, 4, 8, 8, 10, 3, 19, 4, 10, 4, 12, 3, 18, 6, 7, 5, 12, 4, 19 (list; graph; listen)
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Last modified December 5 08:23 EST 2009. Contains 170348 sequences.


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