OFFSET
1,2
COMMENTS
a(n) is prime for n in A136685.
LINKS
Eric Weisstein's World of Mathematics, Harmonic Number.
EXAMPLE
The first few fractions are 1, 31/32, 7565/7776, 241837/248832, 755989457/777600000, 755889457/777600000, ... = a(n)/A334604(n). - Petros Hadjicostas, May 07 2020
MATHEMATICA
Table[ Numerator[ Sum[ (-1)^(k+1)/k^5, {k, 1, n} ] ], {n, 1, 30} ]
PROG
(PARI) a(n) = numerator(sum(k=1, n, (-1)^(k+1)/k^5)); \\ Michel Marcus, May 07 2020
CROSSREFS
KEYWORD
frac,nonn
AUTHOR
Alexander Adamchuk, Jan 16 2008
STATUS
approved