Logo

A005561 formatted as a simple table:

n a(n)
3 1
4 4
5 24
6 84
7 392
8 1344
9 5760
10 19800
11 81675
12 283140
13 1145144
14 4008004
15 16032016
16 56632576
17 225059328
18 801773856
19 3173688180
20 11392726800
21 44986664800

[1,4,24,84,392,1344,5760,19800,81675,283140,
 1145144,4008004,16032016,56632576,225059328,
 801773856,3173688180,11392726800,44986664800]

Lookup | Welcome | Find friends | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Transforms | Puzzles | Hot | Classics
More pages | Superseeker | Maintained by N. J. A. Sloane (njas@research.att.com)

Last modified November 27 22:38 EST 2009. Contains 167602 sequences.


AT&T Labs Research