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A027000 formatted as a simple table:

n a(n)
1 1
2 13
3 54
4 171
5 487
6 1324
7 3525
8 9297
9 24418
10 64015
11 167691
12 439128
13 1149769
14 3010261
15 7881102
16 20633139
17 54018415
18 141422212
19 370248333
20 969322905
21 2537720506
22 6643838743

[1,13,54,171,487,1324,3525,9297,24418,64015,
 167691,439128,1149769,3010261,7881102,20633139,
 54018415,141422212,370248333,969322905,2537720506,
 6643838743]

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Last modified December 10 12:37 EST 2009. Contains 170569 sequences.


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