A002141 Class numbers of quadratic fields. (Formerly M3745 N1530)

1, 1, 5, 6, 7, 7, 9, 53, 60, 66, 83, 83, 136, 136, 185, 185, 185, 312, 312, 312, 3064, 3718, 3718, 3718, 8096, 9826, 12384, 16602, 16602, 16602, 16760, 16760, 182424, 323392, 323392, 323392, 323392

Offset

3,3

References

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=3..39.

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

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

Index entries for sequences related to quadratic fields

Crossrefs

Sequence in context: A029911 A328941 A205691 * A367150 A368121 A368126

Adjacent sequences: A002138 A002139 A002140 * A002142 A002143 A002144

Keyword

nonn

Author

N. J. A. Sloane

Status

approved