A112820 - OEIS

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A112820

Numbers k such that lcm(1,2,3,...,k)/17 equals the denominator of the k-th harmonic number H(k).

272, 273, 274, 275, 276, 277, 278, 279, 280, 281, 282, 283, 284, 285, 286, 287, 288, 79507, 79508, 79509, 79510, 79511, 79512, 79513, 79514, 79515, 79516, 79517, 79518, 79519, 79520, 79521, 79522, 79523, 79524, 79525, 79526, 79527, 79528

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OFFSET

1,1

COMMENTS

When 17 occurs in A110566.

LINKS

Chai Wah Wu, Table of n, a(n) for n = 1..10000 (n = 1..3106 from Jinyuan Wang)

MATHEMATICA

a = h = 1; t = {}; Do[a = LCM[a, n]; h = h + 1/n; If[a/Denominator[h] == 17, AppendTo[t, n]], {n, 79528}]; t

CROSSREFS

Cf. A002805, A003418, A110566.

Cf. A098464, A112813, A112814, A112815, A112816, A112817, A112818, A112819, A112821, A112822.

Sequence in context: A303886 A305279 A005933 * A304892 A316574 A062906

Adjacent sequences: A112817 A112818 A112819 * A112821 A112822 A112823

KEYWORD

nonn

AUTHOR

Robert G. Wilson v, Sep 17 2005

EXTENSIONS

Definition corrected by Jinyuan Wang, May 03 2020

STATUS

approved