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A003699 formatted as a simple table:

n a(n)
1 1
2 6
3 22
4 82
5 306
6 1142
7 4262
8 15906
9 59362
10 221542
11 826806
12 3085682
13 11515922
14 42978006
15 160396102
16 598606402
17 2234029506
18 8337511622
19 31116016982
20 116126556306
21 433390208242
22 1617434276662
23 6036346898406

[1,6,22,82,306,1142,4262,15906,59362,221542,
 826806,3085682,11515922,42978006,160396102,
 598606402,2234029506,8337511622,31116016982,
 116126556306,433390208242,1617434276662,
 6036346898406]

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


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