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A001987 Class numbers associated with entries of A001986.
(Formerly M5235 N2278)
5
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 33, 79, 79, 107, 107, 311, 487, 487, 665, 665, 857, 2293, 3523, 3523, 3523, 13909, 13909, 13909, 26713, 29351, 29351, 59801, 70877, 70877, 70877, 70877, 296475, 296475, 296475, 296475, 3201195 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,12

REFERENCES

M. J. Jacobson, Jr., Computational Techniques in Quadratic Fields, Master's thesis, University of Manitoba, Winnipeg, Manitoba, 1995.

Jacobson, Michael J., Jr. and Williams, Hugh C., New quadratic polynomials with high densities of prime values, Math. Comp. 72 (2003), no. 241, 499-519.

D. H. Lehmer, E. Lehmer and D. Shanks, Integer sequences having prescribed quadratic character, Math. Comp., 24 (1970), 433-451.

N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence).

N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).

LINKS

Table of n, a(n) for n=1..42.

D. H. Lehmer, E. Lehmer and D. Shanks, Integer sequences having prescribed quadratic character, Math. Comp., 24 (1970), 433-451 [Annotated scanned copy]

CROSSREFS

Cf. A001986, A094841-A094845, etc.

Sequence in context: A211837 A138863 A138866 * A094846 A044171 A044552

Adjacent sequences:  A001984 A001985 A001986 * A001988 A001989 A001990

KEYWORD

nonn

AUTHOR

N. J. A. Sloane.

EXTENSIONS

Revised Jun 14 2004

STATUS

approved

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Last modified November 16 04:54 EST 2018. Contains 317257 sequences. (Running on oeis4.)