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A055553 as a simple table

n a(n)
1 0
2 0
3 1
4 7
5 16
6 43
7 105
8 255
9 646
10 1547
11 3605
12 8241
13 19279
14 44706
15 105212
16 246683
17 585355
18 1401644
19 3381806
20 8220777
21 20138200

[0,0,1,7,16,43,105,255,646,1547,3605,8241,19279,
 44706,105212,246683,585355,1401644,3381806,
 8220777,20138200]

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Last modified May 28 10:49 EDT 2020. Contains 334681 sequences. (Running on oeis4.)