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A154887
Number of ways to partition n into distinct reduced fractions i/j with j<=n.
3
1, 2, 11, 71, 838, 7915, 181443
OFFSET
1,2
EXAMPLE
a(3) = #{3, 8/3+1/3, 5/2+1/2, 7/3+2/3, 2+1, 2+2/3+1/3, 5/3+4/3, 5/3+1+1/3, 3/2+1+1/2, 3/2+2/3+1/2+1/3, 4/3+1+2/3} = 11. - corrected by Reinhard Zumkeller, Feb 02 2009
CROSSREFS
KEYWORD
more,nonn
AUTHOR
Reinhard Zumkeller, Jan 17 2009
STATUS
approved