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A057786 formatted as a simple table:

n a(n)
1 1
2 2
3 4
4 10
5 27
6 85
7 262
8 873
9 2917
10 10011
11 34561
12 120815
13 424468
14 1501441
15 5334181
16 19035075
17 68167472
18 244928324
19 882555803
20 3188480899
21 11546307356

[1,2,4,10,27,85,262,873,2917,10011,34561,120815,
 424468,1501441,5334181,19035075,68167472,
 244928324,882555803,3188480899,11546307356]

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Last modified December 2 11:54 EST 2009. Contains 167921 sequences.


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