OFFSET
2,2
COMMENTS
LINKS
Wolfdieter Lang, r(n) numbers and comments with a proof.
FORMULA
a(n) = denominator(r(n)), with rational r(n) := Sum_{k=1..n-1} 1/k^n + 1/((n-1)*(n-1)!), n >= 2, written in lowest terms. For n*n! see A001563(n).
EXAMPLE
The positive rationals r(n), n >= 2: 2/1, 11/8, 1465/1296, 260467/248832, 47541136609/46656000000, ...
CROSSREFS
KEYWORD
nonn,frac,easy
AUTHOR
Wolfdieter Lang, Jun 11 2004
STATUS
approved