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A002803 formatted as a simple table:

n a(n)
0 1
1 15
2 140
3 1050
4 6930
5 42042
6 240240
7 1312740
8 6928350
9 35565530
10 178474296
11 878850700
12 4259045700
13 20359174500
14 96172862400
15 449608131720
16 2082743551350
17 9569730173850
18 43651400793000
19 197809768856700

[1,15,140,1050,6930,42042,240240,1312740,6928350,
 35565530,178474296,878850700,4259045700,
 20359174500,96172862400,449608131720,
 2082743551350,9569730173850,43651400793000,
 197809768856700]

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Last modified December 15 00:47 EST 2009. Contains 170825 sequences.


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