login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A064378 a(0) = 2, a(n) = 2^(n+1)*(n-1)! (n >= 1). 0
2, 4, 8, 32, 192, 1536, 15360, 184320, 2580480, 41287680, 743178240, 14863564800, 326998425600, 7847962214400, 204047017574400, 5713316492083200, 171399494762496000, 5484783832399872000, 186482650301595648000, 6713375410857443328000 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

Table of n, a(n) for n=0..19.

FORMULA

E.g.f.: 2-2*log(1-2x).

MATHEMATICA

Join[{2}, Table[2^(n+1) (n-1)!, {n, 20}]] (* Harvey P. Dale, Mar 12 2013 *)

CROSSREFS

Cf. A032184.

Sequence in context: A074406 A186340 A228920 * A191650 A036544 A094334

Adjacent sequences:  A064375 A064376 A064377 * A064379 A064380 A064381

KEYWORD

nonn

AUTHOR

Anon (pi_dpiper(AT)yahoo.com), Sep 27 2001

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 September 19 23:31 EDT 2019. Contains 327207 sequences. (Running on oeis4.)