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 A035115 Relative class number h- of cyclotomic field Q(zeta_m) where m is n-th term of A035113. 4
 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 3, 1, 2, 1, 3, 2, 3, 1, 8, 9, 5, 17, 8, 5, 9, 4, 37, 9, 7, 19, 19, 121, 10, 11, 55, 55, 11, 211, 43, 69, 201, 695, 64, 351, 13, 468, 39, 507, 156, 84, 75, 4889, 2593, 1536, 10752, 41241, 76301, 1280, 6795 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,28 REFERENCES L. C. Washington, Introduction to Cyclotomic Fields, Springer, p. 353. LINKS FORMULA a(n) = A061653(A035113(n)). MATHEMATICA (* This is only a recomputation of the existing data. *) terms = 76; A035113 = Sort[Select[Range[3 terms], Mod[#, 4] != 2&], EulerPhi[#1] <= EulerPhi[#2]&]; A061653 = Import["https://oeis.org/A061653/b061653.txt", "Table"][[All, 2]]; a[n_] := A061653[[A035113[[n]] ]]; Array[a, terms] (* Jean-François Alcover, Aug 17 2019 *) CROSSREFS Cf. A000010, A035113, A035114, A055513, A061494, A061653. Sequence in context: A029351 A178638 A290496 * A146969 A090270 A326441 Adjacent sequences:  A035112 A035113 A035114 * A035116 A035117 A035118 KEYWORD nonn,nice AUTHOR EXTENSIONS Changed 41421 to 41241, value is given incorrectly in first edition of Washington, Matthew Johnson, Jul 20 2013 STATUS approved

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Last modified September 20 02:20 EDT 2019. Contains 327207 sequences. (Running on oeis4.)