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A068055 formatted as a simple table:

n a(n)
1 1
2 4
3 12
4 30
5 71
6 155
7 336
8 700
9 1451
10 2963
11 6000
12 12107
13 24323
14 48870
15 97987
16 196223
17 392767
18 785945
19 1572352
20 3145553
21 6291979 

[1,4,12,30,71,155,336,700,1451,2963,6000,12107,
 24323,48870,97987,196223,392767,785945,1572352,
 3145553,6291979]

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Last modified December 6 13:45 EST 2009. Contains 170429 sequences.

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