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A050251 formatted as a simple table:

n a(n)
0 4
1 5
2 20
3 20
4 113
5 113
6 781
7 781
8 5953
9 5953
10 47995
11 47995
12 401696
13 401696
14 3438339
15 3438339
16 30483565
17 30483565
18 269577430
19 269577430
20 2427668363
21 2427668363

[4,5,20,20,113,113,781,781,5953,5953,47995,47995,
 401696,401696,3438339,3438339,30483565,30483565,
 269577430,269577430,2427668363,2427668363]

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Last modified November 29 12:46 EST 2009. Contains 167659 sequences.


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