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A030800 formatted as a simple table:

n a(n)
1 2
2 4
3 13
4 52
5 264
6 1589
7 11123
8 88989
9 800902
10 8009022
11 88099244
12 1057190930
13 13743482102
14 192408749440
15 2886131241604
16 46178099865665
17 785027697716317
18 14130498558893720
19 268479472618980693
20 5369589452379613862

[2,4,13,52,264,1589,11123,88989,800902,8009022,
 88099244,1057190930,13743482102,192408749440,
 2886131241604,46178099865665,785027697716317,
 14130498558893720,268479472618980693,
 5369589452379613862]

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Last modified December 15 00:42 EST 2009. Contains 170824 sequences.


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