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A076498 Class number h(p) of real quadratic field Q(sqrt(p)) where p is n-th prime == 1 mod 4. 1

%I

%S 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,3,1,1,3,1,1,1,1,1,1,1,1,1,

%T 1,1,1,5,1,1,1,1,1,1,1,1,1,1,1,7,1,1,1,1,1,1,1,1,1,1,1,3,1,3,1,1,1,1,

%U 1,1,1,1,1,1,1,1,1,1,1,1

%N Class number h(p) of real quadratic field Q(sqrt(p)) where p is n-th prime == 1 mod 4.

%D H. Williams and H. te Riele, New computations concerning the Cohen-Lenstar heuristics, Experiment. Math. 12 (2003), no. 1, 99-113.

%e h(p) = 1 for p < 229, h(229) = h(257) = h(733) = h(761) = 3, h(401)=5 and h(577)=7, ...

%Y Cf. A002144, A076499.

%K nonn

%O 1,22

%A _N. J. A. Sloane_, Nov 11 2002

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Last modified June 16 12:38 EDT 2019. Contains 324152 sequences. (Running on oeis4.)