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

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A046674 A046673/2. 3
1, 18, 660, 42000, 4142880, 586776960, 113020427520, 28432576972800, 9056055981772800, 3562946373482496000, 1697172166720622592000, 962691052768668647424000, 641260394342965606809600000, 495681727573700350908825600000, 440084864982859007245221888000000 (list; graph; refs; listen; history; internal format)
OFFSET

0,2

CROSSREFS

Cf. A000254, A049034.

Sequence in context: A049869 A041615 A041612 * A073421 A159873 A180781

Adjacent sequences:  A046671 A046672 A046673 * A046675 A046676 A046677

KEYWORD

nonn

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com).

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Transforms | Puzzles | Hot | Classics
Recent Additions | More pages | Superseeker | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement .

Last modified February 14 23:53 EST 2012. Contains 205689 sequences.