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A121635 formatted as a simple table:

n a(n)
1 1
2 2
3 8
4 42
5 264
6 1920
7 15840
8 146160
9 1491840
10 16692480
11 203212800
12 2674425600
13 37841126400
14 572885913600
15 9240898867200
16 158228598528000
17 2866422214656000
18 54775863926784000
19 1101208277385216000

[1,2,8,42,264,1920,15840,146160,1491840,16692480,
 203212800,2674425600,37841126400,572885913600,
 9240898867200,158228598528000,2866422214656000,
 54775863926784000,1101208277385216000]

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Last modified December 20 16:54 EST 2009. Contains 171081 sequences.


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