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A020046 as a simple table

n a(n)
0 1
1 0
2 1
3 5
4 20
5 98
6 583
7 4038
8 31970
9 285069
10 2826941
11 30860773
12 367757553
13 4750201727
14 66106974037
15 986095696055
16 15695356495547
17 265513114049683
18 4757109960056836
19 89988663411075164
20 1792274212937247027

[1,0,1,5,20,98,583,4038,31970,285069,2826941,
 30860773,367757553,4750201727,66106974037,
 986095696055,15695356495547,265513114049683,
 4757109960056836,89988663411075164,
 1792274212937247027]

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Last modified August 24 20:16 EDT 2024. Contains 375417 sequences. (Running on oeis4.)