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A007780 formatted as a simple table:

n a(n)
1 1
2 2
3 3
4 6
5 9
6 11
7 18
8 20
9 27
10 30
11 54
12 81
13 162
14 168
15 243
16 486
17 729
18 1458
19 2187
20 4374
21 6561
22 13122
23 19683
24 39366
25 59049

[1,2,3,6,9,11,18,20,27,30,54,81,162,168,243,486,
 729,1458,2187,4374,6561,13122,19683,39366,59049]

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Last modified December 16 17:18 EST 2009. Contains 170825 sequences.


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