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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
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
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.)