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A001631 formatted as a simple table:

n a(n)
0 0
1 0
2 1
3 0
4 1
5 2
6 4
7 7
8 14
9 27
10 52
11 100
12 193
13 372
14 717
15 1382
16 2664
17 5135
18 9898
19 19079
20 36776
21 70888
22 136641
23 263384
24 507689
25 978602
26 1886316
27 3635991
28 7008598
29 13509507
30 26040412
31 50194508
32 96753025
33 186497452
34 359485397
35 692930382

[0,0,1,0,1,2,4,7,14,27,52,100,193,372,717,1382,
 2664,5135,9898,19079,36776,70888,136641,263384,
 507689,978602,1886316,3635991,7008598,13509507,
 26040412,50194508,96753025,186497452,359485397,
 692930382]

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


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