OFFSET
1,3
EXAMPLE
a(5) = denominator(1^(-1)*2^(0)*3^(-1)*4^(-1)*5^(1)) = denominator(5/12) = 12.
MAPLE
with(numtheory): a:=n->denom(mul(k^mobius(n+1-k), k=1..n)): seq(a(n), n=1..41); # Emeric Deutsch, May 09 2007
PROG
(PARI) a(n) = denominator(prod(k=1, n, k^moebius(n+1-k))); \\ Michel Marcus, Feb 12 2019
CROSSREFS
KEYWORD
frac,nonn
AUTHOR
Leroy Quet, May 06 2007
EXTENSIONS
More terms from Emeric Deutsch, May 09 2007
STATUS
approved