OFFSET
1,16
REFERENCES
W. Feller, An Introduction to Probability Theory and its Applications, 2nd ed, Wiley, New York, 1965, p. 226.
FORMULA
a(n) = floor(n*(1-1/n)^(2n)).
MATHEMATICA
Table[Floor[n*(1 - 1/n)^(2 n)], {n, 100}] (* T. D. Noe, Mar 15 2012 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Washington Bomfim, Mar 14 2012
STATUS
approved