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 A002148 Smallest prime p==3 (mod 8) such that Q(sqrt(-p)) has class number 2n+1. (Formerly M3164 N1282) 10
 3, 59, 131, 251, 419, 659, 1019, 971, 1091, 2099, 1931, 1811, 3851, 3299, 2939, 3251, 4091, 4259, 8147, 5099, 9467, 6299, 6971, 8291, 8819, 14771, 22619, 9539, 13331, 18443, 11171, 16979, 12011, 13859, 16931, 17939, 28211, 19211, 24251, 20411 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,1 REFERENCES D. A. Buell, Binary Quadratic Forms. Springer-Verlag, NY, 1989, pp. 224-241. D. Shanks, Review of R. B. Lakein and S. Kuroda, Tables of class numbers h(-p) for fields Q(sqrt(-p)), p <= 465071, Math. Comp., 24 (1970), 491-492. 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 David Broadhurst and T. D. Noe, Table of n, a(n) for n = 0..10399 MATHEMATICA a=Table[0, {101}]; Do[If[PrimeQ[m], c=NumberFieldClassNumber[Sqrt[-m]]; If[c<102 && a[[c]]==0, a[[c]]=m]], {m, 3, 30000, 8}]; Table[a[[n]], {n, 1, 101, 2}] CROSSREFS Cf. A002143 (class numbers), A002149, A003173, A006203. Sequence in context: A139874 A155032 A107212 * A290977 A200957 A057175 Adjacent sequences:  A002145 A002146 A002147 * A002149 A002150 A002151 KEYWORD nonn AUTHOR EXTENSIONS More terms from Robert G. Wilson v, Apr 17 2001 Edited by Dean Hickerson, Mar 17 2003 STATUS approved

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Last modified December 14 05:36 EST 2019. Contains 329978 sequences. (Running on oeis4.)