The OEIS mourns the passing of Jim Simons and is grateful to the Simons Foundation for its support of research in many branches of science, including the OEIS.
login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A046674 a(n) = A046673(n)/2. 3
1, 18, 660, 42000, 4142880, 586776960, 113020427520, 28432576972800, 9056055981772800, 3562946373482496000, 1697172166720622592000, 962691052768668647424000, 641260394342965606809600000, 495681727573700350908825600000, 440084864982859007245221888000000 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
LINKS
Table of n, a(n) for n=1..15.
CROSSREFS
Cf. A000254, A049034, A046673.
Sequence in context: A049869 A041615 A041612 * A073421 A346216 A295439
Adjacent sequences: A046671 A046672 A046673 * A046675 A046676 A046677
KEYWORD
nonn
AUTHOR
N. J. A. Sloane
EXTENSIONS
Offset changed to 1 by Jon E. Schoenfield, Mar 08 2020
STATUS
approved

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified May 17 12:26 EDT 2024. Contains 372600 sequences. (Running on oeis4.)