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A220862 a(n) = smallest m>0 such that the n-th rational prime p splits in the imaginary quadratic extension field K = Q(sqrt(-m)). 5
-7, -2, -1, -3, -2, -1, -1, -2, -5, -1, -3, -1, -1, -2, -5, -1, -2, -1, -2, -7, -1, -3, -2, -1, -1, -1, -3, -2, -1, -1, -3, -2, -1, -2, -1, -3, -1, -2, -5, -1, -2, -1, -7, -1, -1, -3, -2, -3, -2, -1, -1, -7, -1, -2, -1, -5, -1, -3, -1, -1, -2, -1, -2, -11, -1, -1, -2, -1, -2, -1, -1, -7, -3, -1, -2, -5, -1, -1, -1, -1, -2, -1, -7, -1, -3, -2, -1, -1, -1, -3, -2, -13, -3, -2, -2, -5, -1, -1, -2, -1 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Except for the first term, a(n) = -A088192(n).

REFERENCES

David A. Cox, "Primes of the Form x^2 + n y^2", Wiley, 1989, Cor. 5.17, p. 105.

LINKS

Table of n, a(n) for n=1..100.

CROSSREFS

Cf. A088192, A220861, A220863.

Sequence in context: A089129 A100957 A191856 * A198229 A133362 A317925

Adjacent sequences:  A220859 A220860 A220861 * A220863 A220864 A220865

KEYWORD

sign

AUTHOR

N. J. A. Sloane, Dec 26 2012

STATUS

approved

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Last modified July 11 17:52 EDT 2020. Contains 335626 sequences. (Running on oeis4.)