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A029890 formatted as a simple table:

n a(n)
1 1
2 2
3 7
4 20
5 70
6 234
7 832
8 2956
9 10759
10 39394
11 145892
12 543564
13 2038831
14 7684116
15 29092055
16 110550260
17 421495147
18 1611662256 

[1,2,7,20,70,234,832,2956,10759,39394,145892,
 543564,2038831,7684116,29092055,110550260,
 421495147,1611662256]

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Last modified December 7 08:40 EST 2009. Contains 170430 sequences.

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