A006781
formatted as a simple table:
n
a(n)
1
1
2
2
3
7
4
32
5
168
6
970
7
5984
8
38786
9
261160
10
1812630
11
12895360
12
93638634
[1,2,7,32,168,970,5984,38786,261160,1812630, 12895360,93638634]
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Maintained by
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(
njas@research.att.com
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Last modified December 2 11:54 EST 2009. Contains 167921 sequences.
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