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 A066848 Consider sequence of fractions A066657/A066658 produced by ratios of terms in A066720; let m = smallest integer such that all fractions 1/n, 2/n, ..., (n-1)/n have appeared when we reach A066720(m) = k; sequence gives values of k; set a(n) = -1 if some fraction i/n never appears. 3
 1, 2, 3, 2436, 520, 60, 308, 2436, 15867, 61800, 8096, 55620, 77077, 20216, 51675, 2296992, 21607, 15867, 185820, 481680, 140805, 226644, 145866, 1568928, 1076000, 187772, 5596587, 1831956, 715778, 3540060, 836535, 2296992, 3088008, 1129514, 7096775, 1995048, 2018646, 3159168, 13019136, 15293320, 6936667, 11250624, 6877463, 20475136, 3380040, 3986360, 1052424, 17566608, 5152350, 1076000, 3824694, 8897564, 2987239, 17600004, 24056230, 89537336, 23397531, 2791424, 5393780, 19344660, 5306268, 8679008, 126415359, 30486400, 29303235 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS EXAMPLE 3/4 does not occur until we reach A066720(401) = 2436 and then we see A066720(320)/A066720(401) = 1827/2436 = 3/4. Therefore a(4) = 2436. CROSSREFS Cf. A066720, A066657, A066658. A066849 gives values of m. Sequence in context: A266585 A288171 A137321 * A324310 A125612 A185156 Adjacent sequences:  A066845 A066846 A066847 * A066849 A066850 A066851 KEYWORD nonn,nice AUTHOR N. J. A. Sloane, Jan 21 2002 EXTENSIONS Corrected by John W. Layman, Feb 05 2002 Greatly extended by David Applegate, Feb 13 2002 STATUS approved

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Last modified May 13 05:02 EDT 2021. Contains 343836 sequences. (Running on oeis4.)