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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A004527 Ratios of successive terms are 1,2,2,3,4,4,5,6,6,... 2
1, 1, 2, 4, 12, 48, 192, 960, 5760, 34560, 241920, 1935360, 15482880, 139345920, 1393459200, 13934592000, 153280512000, 1839366144000, 22072393728000, 286941118464000, 4017175658496000, 56240459218944000 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Harvey P. Dale, Table of n, a(n) for n = 0..480

MATHEMATICA

FoldList[Times, 1, Flatten[Append[#, Last[#]]&/@Partition[Range[20], 2]]] (* Harvey P. Dale, Oct 15 2011 *)

CROSSREFS

Sequence in context: A152453 A277281 A172452 * A002871 A013172 A052849

Adjacent sequences:  A004524 A004525 A004526 * A004528 A004529 A004530

KEYWORD

nonn

AUTHOR

N. J. A. Sloane.

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 | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy .

Last modified February 19 03:37 EST 2018. Contains 299330 sequences. (Running on oeis4.)