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A079030 Least k such that the class number of quadratic order of discriminant D=-4k equals n. 0

%I

%S 1,5,11,14,47,26,71,41,59,74,167,89,191,101,131,146,383,236,311,194,

%T 251,269,647,299,479,314,419,341,887,461,719,446,659,614,1031,626,

%U 1487,1199,1019,689,1151,794,1847,854,971,941,3023,1106,1511,1109,1091,1256,2711

%N Least k such that the class number of quadratic order of discriminant D=-4k equals n.

%o (PARI) a(n)=if(n<0,0,k=1; while(abs(n-qfbclassno(-4*k))>0,k++); k)

%Y Cf. A000003.

%K nonn

%O 1,2

%A _Benoit Cloitre_, Feb 01 2003

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Last modified June 28 18:26 EDT 2022. Contains 354907 sequences. (Running on oeis4.)