A006786
formatted as a simple table:
n
a(n)
1
1
2
2
3
4
4
8
5
18
6
44
7
117
8
351
9
1230
10
5069
11
25181
12
152045
13
1116403
14
9899865
15
104980369
16
1318017549
17
19427531763
[1,2,4,8,18,44,117,351,1230,5069,25181,152045, 1116403,9899865,104980369,1318017549,19427531763]
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Maintained by
N. J. A. Sloane
(
njas@research.att.com
)
Last modified December 2 11:54 EST 2009. Contains 167921 sequences.
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