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A128534 formatted as a simple table:

n a(n)
0 0
1 2
2 1
3 6
4 12
5 35
6 88
7 234
8 609
9 1598
10 4180
11 10947
12 28656
13 75026
14 196417
15 514230
16 1346268
17 3524579
18 9227464
19 24157818
20 63245985

[0,2,1,6,12,35,88,234,609,1598,4180,10947,28656,
 75026,196417,514230,1346268,3524579,9227464,
 24157818,63245985]

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Last modified December 20 00:58 EST 2009. Contains 171054 sequences.


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