OFFSET
1,4
COMMENTS
FORMULA
a(n)=denominator(r(n)), with r(n):=sum(b(k)/k!,n=1..n) with b(k):=A075874(k) (factorial expansion of Pi).
EXAMPLE
Rationals r(n): [3,3,3,25/8,47/15,2261/720,15833/5040,42223/13440,42223/13440,...].
CROSSREFS
KEYWORD
nonn,frac,easy
AUTHOR
Wolfdieter Lang Aug 07 2007
STATUS
approved