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A056470 formatted as a simple table:

n a(n)
1 1
2 1
3 2
4 2
5 5
6 5
7 15
8 15
9 52
10 52
11 202
12 202
13 855
14 855
15 3845
16 3845
17 18002
18 18002
19 86472
20 86472
21 422005
22 422005
23 2079475
24 2079475
25 10306752
26 10306752
27 51263942
28 51263942
29 255514355
30 255514355
31 1275163905

[1,1,2,2,5,5,15,15,52,52,202,202,855,855,3845,
 3845,18002,18002,86472,86472,422005,422005,
 2079475,2079475,10306752,10306752,51263942,
 51263942,255514355,255514355,1275163905]

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Last modified December 1 19:22 EST 2009. Contains 167811 sequences.


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