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A256103 a(n) = gcd(A001008(m(n)), m(n)), with m(n) = A256102(n), n >= 1. 4
5, 7, 11, 11, 13, 17, 19, 23, 29, 31, 43, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97, 11, 101, 103, 107, 109, 113, 127, 131, 137, 139, 149, 151, 157, 163, 167, 173, 179, 181, 191, 193, 197, 199, 211, 223 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
See A256102. The entry a(n) gives the quotient of the numerator of the harmonic sum of the first A256102(n) positive integers and the denominator of the harmonic mean of the same numbers. For each positive integer values m not from A256102 this quotient is 1.
LINKS
FORMULA
a(n) = gcd(A001008(m(n)), m(n)), with m(n) = A256102(n), n >= 1.
a(n) = A001008(m(n))/A175441(m(n)), with m(n) = A256103(n), n >= 1.
EXAMPLE
n = 1: gcd(A001008(20), 20) = gcd(55835135, 20) = 5. A001008(20)/A175441(20) = 55835135/11167027 = 5.
Because 19 is not from A256102 one has A001008(19) = A175441(19) = 275295799.
CROSSREFS
Sequence in context: A107257 A275515 A098806 * A275645 A122278 A124109
KEYWORD
nonn,easy
AUTHOR
Wolfdieter Lang, Apr 16 2015
STATUS
approved

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Last modified March 28 18:04 EDT 2024. Contains 371254 sequences. (Running on oeis4.)