A006866
formatted as a simple table:
n
a(n)
4
1
5
1
6
2
7
3
8
9
9
19
10
71
11
249
12
1058
13
4705
14
22380
[1,1,2,3,9,19,71,249,1058,4705,22380]
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(
njas@research.att.com
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Last modified December 17 23:40 EST 2009. Contains 171025 sequences.
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