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A347300
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Under Hypothesis(H) (a version of the Generalized Riemann Hypothesis) the only principal real quadratic fields with discriminant d = r^2 + 1 == 1 (mod 4) are the fields Q(sqrt(t)) where t is one of the six numbers listed here.
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0
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OFFSET
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1,1
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REFERENCES
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Gilles Lachaud, On real quadratic fields, Bull. Amer. Math. Soc., 17:2 (1987), 307-311. See Theorem 3.2.
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LINKS
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Table of n, a(n) for n=1..6.
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CROSSREFS
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Cf. A003173, A003174, A014602, A050950.
Sequence in context: A147204 A168024 A121326 * A212876 A147219 A146280
Adjacent sequences: A347297 A347298 A347299 * A347301 A347302 A347303
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KEYWORD
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nonn,fini,full
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AUTHOR
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N. J. A. Sloane, Aug 28 2021
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STATUS
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approved
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