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A002142 Primes p == 1 (mod 4) where class number of Q(sqrt p) increases.
(Formerly M4032 N1673)
2
5, 229, 401, 577, 1129, 1297, 7057, 8761, 14401, 32401, 41617, 57601, 90001 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

REFERENCES

D. Shanks, Review of "K. E. Kloss et al., Class number of primes of the form 4n+1", Math. Comp., 23 (1969), 213-214.

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..13.

D. Shanks, Review of "K. E. Kloss et al., Class number of primes of the form 4n+1", Math. Comp., 23 (1969), 213-214. [Annotated scanned preprint of review]

CROSSREFS

Sequence in context: A201491 A181584 A300390 * A103732 A065757 A157776

Adjacent sequences:  A002139 A002140 A002141 * A002143 A002144 A002145

KEYWORD

nonn

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified October 23 17:19 EDT 2019. Contains 328373 sequences. (Running on oeis4.)