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A026555 formatted as a simple table:

n a(n)
1 1
2 2
3 7
4 13
5 40
6 76
7 226
8 434
9 1279
10 2470
11 7267
12 14085
13 41462
14 80584
15 237484
16 462620
17 1365014
18 2664276
19 7870226
20 15387670
21 45501743
22 89097932
23 263707094
24 517058502
25 1531614109
26 3006637946
27 8912678569
28 17514547015
29 51952990090

[1,2,7,13,40,76,226,434,1279,2470,7267,14085,
 41462,80584,237484,462620,1365014,2664276,7870226,
 15387670,45501743,89097932,263707094,517058502,
 1531614109,3006637946,8912678569,17514547015,
 51952990090]

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Last modified December 15 00:47 EST 2009. Contains 170825 sequences.


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