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A120421 formatted as a simple table:

n a(n)
1 1
2 2
3 3
4 6
5 10
6 20
7 36
8 72
9 135
10 272
11 528
12 1052
13 2080
14 4160
15 8244
16 16508
17 32896
18 65768

[1,2,3,6,10,20,36,72,135,272,528,1052,2080,4160,
 8244,16508,32896,65768]

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


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