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A121050 Partial sums of floor(n!/e^n). 0
0, 0, 0, 0, 0, 1, 5, 18, 62, 226, 892, 3835, 17910, 90401, 490421, 2844970, 17570207, 115078228, 796630963, 5811215750, 44551231383, 358087648032, 3010990488143, 26433752431402, 241852566790848, 2302304545944415, 22768248457537798, 233580248716343376 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,7
LINKS
FORMULA
a(n) = Sum_{i=1..n} floor(i!/exp(i)).
MATHEMATICA
Accumulate[Table[Floor[n!/Exp[n]], {n, 30}]] (* Harvey P. Dale, Aug 25 2016 *)
CROSSREFS
Sequence in context: A122234 A113301 A111567 * A029869 A033453 A284840
KEYWORD
easy,nonn
AUTHOR
Jonathan Vos Post, Aug 08 2006
EXTENSIONS
Corrected by and incorrect examples removed by Harvey P. Dale, Aug 25 2016
STATUS
approved

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Last modified March 29 00:26 EDT 2024. Contains 371264 sequences. (Running on oeis4.)