OFFSET
1,7
COMMENTS
Conjecture: every odd prime occurs as a term in the sequence.
Observation: Terms other than 1 are rare. Of the terms a(1) .. a(29524), only 187 are larger than one. Among these 187 terms, the following 50 distinct values occur: 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97, 101, 103, 107, 109, 113, 121, 127, 131, 137, 139, 149, 151, 157, 163, 167, 173, 227, 257, 269, 509, 863, 919, 1049, 1331, 9409, 11881. Of these, all other are primes except 121 = 11*11, 1331 = 11*11*11, 9409 = 97*97 and 11881 = 109*109. - Antti Karttunen, Aug 28 2017
LINKS
Antti Karttunen, Table of n, a(n) for n = 1..29524
PROG
(PARI)
A001008(n) = numerator(sum(i=1, n, 1/i)); \\ This function from Michael B. Porter, Dec 08 2009
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Vladeta Jovovic, May 20 2004
EXTENSIONS
More terms from David Wasserman, Apr 20 2007
Name edited (A001008 substituted for "Wolstenholme") by Antti Karttunen, Aug 28 2017
STATUS
approved