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A020754 formatted as a simple table:

n a(n)
1 1
2 3
3 7
4 47
5 241
6 843
7 22019
8 217069
9 1092746
10 8870023
11 221167421
12 47255689914
13 82462576219
14 1043460553363
15 79180770078547 

[1,3,7,47,241,843,22019,217069,1092746,8870023,
 221167421,47255689914,82462576219,1043460553363,
 79180770078547]

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Last modified December 11 12:57 EST 2009. Contains 170656 sequences.

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