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A002619 formatted as a simple table:

n a(n)
1 1
2 1
3 2
4 3
5 8
6 24
7 108
8 640
9 4492
10 36336
11 329900
12 3326788
13 36846288
14 444790512
15 5811886656
16 81729688428
17 1230752346368
18 19760413251956
19 336967037143596
20 6082255029733168
21 115852476579940152
22 2322315553428424200
23 48869596859895986108

[1,1,2,3,8,24,108,640,4492,36336,329900,3326788,
 36846288,444790512,5811886656,81729688428,
 1230752346368,19760413251956,336967037143596,
 6082255029733168,115852476579940152,
 2322315553428424200,48869596859895986108]

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


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