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A215460
Floor(n!^2 / n^n).
0
1, 1, 1, 2, 4, 11, 30, 96, 339, 1316, 5584, 25733, 128025, 683949, 3905083, 23731187, 152934464, 1041782238, 7479469995, 56448098958, 446768591341, 3700276748921, 32007269639380, 288630046441757, 2708888570942365, 26419890078249485, 267389254029561667
OFFSET
1,4
EXAMPLE
a(4) = Floor((4!)^2 / (4^4)) = Floor(24^2 / 256) = Floor(2.25) = 2.
PROG
(Python)
f = 1
for n in range(1, 33):
print f*f // n**n,
f *= n+1
CROSSREFS
KEYWORD
nonn
AUTHOR
Alex Ratushnyak, Aug 11 2012
STATUS
approved