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 A071759 Consider sequence b(m) = | Sum_{k=1..m} mu(k)/k |; sequence gives numerators of record low values of b(m). 1
 1, 1, -1, -1, -1, -8549627883788520181, 774925721037986124275366676266697490065342673242708598 (list; graph; refs; listen; history; text; internal format)
 OFFSET 2,6 COMMENTS a(4) = (-1) because the initial minimal magnitudes of harmonic series are: 1, 1/2, 1/6, (-1)/30. LINKS Table of n, a(n) for n=2..8. PROG (PARI) t = 0; t1 = 1; v = []; for( n = 1, 200, t = t + mu( n) / n; if( ( t / t1)^2 < 1, t1 = t; v = concat( v, numer( t)), )); v CROSSREFS Cf. A071760. Sequence in context: A213529 A187714 A222534 * A364363 A215876 A095435 Adjacent sequences: A071756 A071757 A071758 * A071760 A071761 A071762 KEYWORD sign,frac AUTHOR Donald S. McDonald, May 18 2002 STATUS approved

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Last modified February 29 23:21 EST 2024. Contains 370428 sequences. (Running on oeis4.)