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A180589
a(n)=floor(n!*h(n)/n), where h(n)=sum(1/k,k=1..10)
0
1, 1, 3, 12, 54, 294, 1866, 13698, 114064, 1062864, 10958530, 123870240, 1523289156, 20247546240, 289277533440, 4420892649600, 71965034739952, 1243166003251200, 22713955095665178, 437647401838080000
OFFSET
1,3
FORMULA
a(n)= ( A000254(n) - A061006(n) )/n
MAPLE
h:= n->sum(1/k, k=1..n):seq(floor(n!*h(n)/n), n=1..25);
CROSSREFS
KEYWORD
nonn
AUTHOR
Gary Detlefs, Sep 10 2010
STATUS
approved