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A106032
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a(n) is the number of orbits under the action of GL_2[Z] on the primitive binary quadratic forms of discriminant D, where D>1 is the n-th fundamental discriminant.
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0
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1, 1, 2, 1, 1, 2, 2, 2, 1, 2, 1, 2, 1, 2, 1, 2, 2, 4, 1, 2, 2, 1, 2, 2, 2, 2, 1, 2, 2, 1, 1, 2, 4, 1, 1, 4, 2, 2, 2, 3, 1, 4, 2, 3, 1, 2, 4, 1, 2, 4, 4, 2, 1, 2, 1, 2, 2, 2, 1
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OFFSET
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1,3
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COMMENTS
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A003646 is the same except it is under the action of SL_2[Z].
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LINKS
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EXAMPLE
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D = 5, 8, 12, 13, 17, 21, 24, 28, ..., that is, A003658.
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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