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A128269 formatted as a simple table:

n a(n)
1 1
2 1
3 2
4 2
5 12
6 2
7 60
8 2
9 30
10 2
11 570
12 2
13 4116
14 2
15 144
16 2
17 39600
18 2
19 747694
20 2
21 9720308
22 2
23 115638138
24 2
25 1261104380
26 2
27 3814717230
28 2
29 137331022698
30 2
31 2137994925180
32 2
33 8901006912
34 2
35 274682981784
36 2
37 46154014360092
38 2
39 29022598622
40 2

[1,1,2,2,12,2,60,2,30,2,570,2,4116,2,144,2,39600,
 2,747694,2,9720308,2,115638138,2,1261104380,2,
 3814717230,2,137331022698,2,2137994925180,2,
 8901006912,2,274682981784,2,46154014360092,2,
 29022598622,2]

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Last modified December 16 13:01 EST 2009. Contains 170825 sequences.


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