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A001011 formatted as a simple table:

n a(n)
1 1
2 1
3 2
4 5
5 14
6 38
7 120
8 353
9 1148
10 3527
11 11622
12 36627
13 121622
14 389560
15 1301140
16 4215748
17 13976335
18 46235800
19 155741571
20 512559185
21 1732007938
22 5732533570
23 19423092113
24 64590165281
25 219349187968
26 732358098471

[1,1,2,5,14,38,120,353,1148,3527,11622,36627,
 121622,389560,1301140,4215748,13976335,46235800,
 155741571,512559185,1732007938,5732533570,
 19423092113,64590165281,219349187968,
 732358098471]

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Last modified December 16 17:18 EST 2009. Contains 170825 sequences.


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