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A012662 as a simple table

n a(n)
0 1
1 0
2 1
3 6
4 21
5 100
6 957
7 8498
8 70217
9 762696
10 9950809
11 128378910
12 1775380893
13 28325140012
14 483428842197
15 8558590549322
16 163465935697169
17 3367220579004048
18 72712394227734577
19 1648059951297530166

[1,0,1,6,21,100,957,8498,70217,762696,9950809,
 128378910,1775380893,28325140012,483428842197,
 8558590549322,163465935697169,3367220579004048,
 72712394227734577,1648059951297530166]

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Last modified April 1 03:04 EDT 2023. Contains 361673 sequences. (Running on oeis4.)