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A133673 formatted as a simple table:

n a(n)
2 7
3 18
4 40
5 83
6 163
7 311
8 579
9 1060
10 1914
11 3419
12 6053
13 10637
14 18575
15 32262
16 55772
17 96019
18 164711
19 281635
20 480171
21 816536 

[7,18,40,83,163,311,579,1060,1914,3419,6053,10637,
 18575,32262,55772,96019,164711,281635,480171,
 816536]

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Last modified November 30 13:13 EST 2009. Contains 167758 sequences.

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