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A156917 formatted as a simple table:

n a(n)
0 1
1 1
2 1
3 1
4 40
5 1
6 1
7 1210
8 1210
9 1
10 1
11 33880
12 1024870
13 33880
14 1
15 1
16 925771
17 784128037
18 784128037
19 925771
20 1
21 1
22 25095280
23 580812061522
24 16262737722616
25 580812061522
26 25095280
27 1
28 1
29 678468820
30 425659125229240
31 325671796712891524

[1,1,1,1,40,1,1,1210,1210,1,1,33880,1024870,33880,
 1,1,925771,784128037,784128037,925771,1,1,
 25095280,580812061522,16262737722616,580812061522,
 25095280,1,1,678468820,425659125229240,
 325671796712891524]

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Last modified November 27 22:38 EST 2009. Contains 167602 sequences.


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