OFFSET
1,2
COMMENTS
FORMULA
a(n)=denominator(r(n)), with r(n):=sum(b(k)/k!,n=1..n) with b(k):=A068451(k).
EXAMPLE
Rationals r(n):[1, 3/2, 3/2, 19/12, 97/60, 97/60, 453/280, 65239/40320,...].
CROSSREFS
KEYWORD
nonn,frac,easy
AUTHOR
Wolfdieter Lang Aug 07 2007
STATUS
approved