OFFSET
1,2
EXAMPLE
PROG
(PARI) a(n) = denominator(sum(j=1, n, sum(i=1, n, (-1)^(i+j)*i/j))); \\ Michel Marcus, May 09 2020
CROSSREFS
KEYWORD
nonn,frac
AUTHOR
Petros Hadjicostas, May 09 2020
EXTENSIONS
More terms from Michel Marcus, May 09 2020
STATUS
approved