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A102272 2-class number of Q(sqrt(-21p)) as p runs through primes in A102271. +0
1
16, 8, 8, 8, 16, 16, 8, 32, 16, 16, 16, 8, 16, 8, 64, 8, 8, 8, 8, 128, 16, 8, 8, 32 (list; graph; listen)
OFFSET

1,1

REFERENCES

Cohn, H. and Lagarias, J. C., On the existence of fields governing the 2-invariants of the classgroup of Q(sqrt{dp}) as p varies, Math. Comp. 41 (1983), 711-730.

CROSSREFS

Cf. A102269-A102275.

Sequence in context: A007263 A033336 A102270 this_sequence A083536 A040243 A164703

Adjacent sequences: A102269 A102270 A102271 this_sequence A102273 A102274 A102275

KEYWORD

nonn

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com), Feb 19 2005

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Last modified December 13 23:45 EST 2009. Contains 170824 sequences.


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