A071758 Successive minima of partial sum of harmonic series Sum (mu(n)/n) are approximately 1/a(n).

2, 6, -30, -105, -2310, -6860, 6922, -6955, -7021, -192857, -201094, -220036, -679269, -736738, -762102, -2538828, -2621491, -3325700, -6146329, -9601104, -9659740, -10027087, -10355141, -220990748

Offset

1,1

Links

Table of n, a(n) for n=1..24.

Example

a(3) = 30 because the third successive minimum is (1 - 1/2 - 1/3 - 1/5) = -1/(30).

Prog

(PARI) t = 0.; t1 = 1; v = []; for( n = 1, 200, t = t + moebius(n)/n; if( ( t/t1)^2 < 1, t1 = t; v = concat( v, floor( 1/t)), )); v

Crossrefs

Cf. A008683.

Sequence in context: A335396 A034501 A203461 * A071760 A304579 A036752

Adjacent sequences: A071755 A071756 A071757 * A071759 A071760 A071761

Keyword

sign

Author

Donald S. McDonald, May 18 2002

Extensions

More terms from Donald S. McDonald, verified by Sean A. Irvine, Sep 30 2018

Status

approved