|
Search: id:A033540
|
|
| |
|
| 1, 2, 6, 21, 88, 445, 2676, 18739, 149920, 1349289, 13492900, 148421911, 1781062944, 23153818285, 324153456004, 4862301840075, 77796829441216, 1322546100500689, 23805829809012420, 452310766371235999
(list; graph; listen)
|
|
|
OFFSET
|
1,2
|
|
|
FORMULA
|
a(n)=n!*(1+1/0!+1/1!+...+1/(n-1)!) [ Jon Bentley, jlb(AT)research.bell-labs.com ]
For n>=1, a(n+1)=floor((1+e)*n!)-1. - Benoit Cloitre (benoit7848c(AT)orange.fr), Sep 07 2002
a(n) = n! + A007526(n). E.g.f.: (1+x*exp(x))/(1-x). - Vladeta Jovovic (vladeta(AT)Eunet.yu), Feb 02 2003
|
|
CROSSREFS
|
Adjacent sequences: A033537 A033538 A033539 this_sequence A033541 A033542 A033543
Sequence in context: A099947 A121726 A090805 this_sequence A115089 A001928 A005638
|
|
KEYWORD
|
nonn,easy
|
|
AUTHOR
|
Antti Karttunen
|
|
|
Search completed in 0.002 seconds
|
