login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A030814 a(n) = floor(exp(15/23) * n!). 2
1, 3, 11, 46, 230, 1382, 9675, 77402, 696624, 6966242, 76628663, 919543959, 11954071471, 167357000594, 2510355008911, 40165680142590, 682816562424042, 12290698123632756, 233523264349022367, 4670465286980447352 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..20.

EXAMPLE

15/23 = 0.65217391304347826...

e^(15/23) = 1.91970957781434403430534711... so a(1) = 1.

e^(15/23) * 2! = 3.83941915562868806861... so a(2) = 3.

e^(15/23) * 3! = 11.518257466886064205832... so a(3) = 11.

MATHEMATICA

Floor[Exp[15/23] Range[20]!] (* Harvey P. Dale, Feb 11 2015 *)

CROSSREFS

Cf. A021027 (1/23).

Sequence in context: A248426 A337913 A129579 * A030976 A264416 A290712

Adjacent sequences:  A030811 A030812 A030813 * A030815 A030816 A030817

KEYWORD

nonn,easy

AUTHOR

Simon Plouffe

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified October 1 04:06 EDT 2020. Contains 337441 sequences. (Running on oeis4.)