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

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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1

Offset: 1

Author

N. J. A. Sloane, Nov 11 2002

Keywords

• nonn

Examples

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

Links

• Herman te Riele and Hugh Williams, New computations concerning the Cohen-Lenstra heuristics, Experiment. Math. 12 (2003), no. 1, 99-113; alternative link.

Crossrefs

Cf. A002144, A003649, A076499.