A089675
formatted as a simple table:
n
a(n)
1
1
2
2
3
3
4
17
5
140
6
990
7
1887
8
3530
9
5996
10
13820
11
21873
12
26045
[1,2,3,17,140,990,1887,3530,5996,13820,21873, 26045]
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(
njas@research.att.com
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Last modified December 10 00:48 EST 2009. Contains 170565 sequences.
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