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A000677 formatted as a simple table:

n a(n)
0 0
1 0
2 1
3 0
4 1
5 1
6 3
7 4
8 11
9 20
10 51
11 108
12 267
13 619
14 1541
15 3762
16 9497
17 23907
18 61216
19 157211
20 407919
21 1063398
22 2792026
23 7365532
24 19535887
25 52037837
26 139213244
27 373820978
28 1007420841
29 2723783122
30 7387129661
31 20091790330
32 54793762295

[0,0,1,0,1,1,3,4,11,20,51,108,267,619,1541,3762,
 9497,23907,61216,157211,407919,1063398,2792026,
 7365532,19535887,52037837,139213244,373820978,
 1007420841,2723783122,7387129661,20091790330,
 54793762295]

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Last modified December 6 19:58 EST 2009. Contains 170429 sequences.


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