OFFSET
0,3
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 0..300
FORMULA
E.g.f.: (exp(x)-1)/(1-x)^2. - Vaclav Kotesovec, Nov 20 2012
a(n) = Sum_{k=0..n-1} C(n,k)*(k+1)! = Sum_{k=0..n-1} A074909(n-1,k)*(k+1)!. - Anton Zakharov, Sep 26 2016
MATHEMATICA
CoefficientList[Series[(E^x-1)/(1-x)^2, {x, 0, 20}], x]*Range[0, 20]! (* Vaclav Kotesovec, Nov 20 2012 *)
Table[Sum[Binomial[n, k] (k + 1)!, {k, 0, n - 1}], {n, 0, 19}] (* Michael De Vlieger, Sep 27 2016 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Creighton Dement, Feb 20 2006
STATUS
approved