A057497
formatted as a simple table:
n
a(n)
1
1
2
1
3
1
4
2
5
6
6
17
7
13
8
17
9
30
10
60
11
555
12
990
13
1616
14
2168
15
2467
16
2648
17
2294
18
1892
19
1283
20
810
[1,1,1,2,6,17,13,17,30,60,555,990,1616,2168,2467, 2648,2294,1892,1283,810]
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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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