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A007022 as a simple table

n a(n)
1 0
2 0
3 0
4 0
5 0
6 1
7 0
8 1
9 1
10 3
11 3
12 11
13 18
14 58
15 139
16 451
17 1326
18 4461
19 14554
20 49957
21 171159
22 598102
23 2098675
24 7437910
25 26490072
26 94944685
27 341867921
28 1236864842
29 4493270976
30 16387852863
31 59985464681
32 220320405895
33 811796327750
34 3000183106119

[0,0,0,0,0,1,0,1,1,3,3,11,18,58,139,451,1326,4461,
 14554,49957,171159,598102,2098675,7437910,
 26490072,94944685,341867921,1236864842,4493270976,
 16387852863,59985464681,220320405895,811796327750,
 3000183106119]

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Last modified April 24 20:08 EDT 2024. Contains 371963 sequences. (Running on oeis4.)