A099435
formatted as a simple table:
n
a(n)
1
1
2
2
3
3
4
10
5
28
6
145
7
990
8
12195
9
273402
[1,2,3,10,28,145,990,12195,273402]
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Maintained by
N. J. A. Sloane
(
njas@research.att.com
)
Last modified December 21 10:15 EST 2009. Contains 171081 sequences.
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