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!)

A151281 as a simple table

n a(n)
0 1
1 2
2 6
3 16
4 48
5 136
6 408
7 1184
8 3552
9 10432
10 31296
11 92544
12 277632
13 824448
14 2473344
15 7365120
16 22095360
17 65920000
18 197760000
19 590790656
20 1772371968
21 5299916800
22 15899750400
23 47578857472
24 142736572416
25 427357700096
26 1282073100288
27 3840133464064
28 11520400392192
29 34517383151616
30 103552149454848

[1,2,6,16,48,136,408,1184,3552,10432,31296,92544,
 277632,824448,2473344,7365120,22095360,65920000,
 197760000,590790656,1772371968,5299916800,
 15899750400,47578857472,142736572416,427357700096,
 1282073100288,3840133464064,11520400392192,
 34517383151616,103552149454848]

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 June 6 09:23 EDT 2024. Contains 373119 sequences. (Running on oeis4.)