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A013467 as a simple table

n a(n)
0 0
1 1
2 1
3 4
4 7
5 53
6 215
7 1895
8 12122
9 132205
10 1144627
11 14912291
12 164213696
13 2477432371
14 33228911417
15 569758644845
16 9014907260096
17 173288317530505
18 3159048447572983
19 67337939660404735
20 1389152842003647000
21 32545156966898107751
22 749093688443752763861
23 19146060950641834007177

[0,1,1,4,7,53,215,1895,12122,132205,1144627,
 14912291,164213696,2477432371,33228911417,
 569758644845,9014907260096,173288317530505,
 3159048447572983,67337939660404735,
 1389152842003647000,32545156966898107751,
 749093688443752763861,19146060950641834007177]

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Last modified October 4 01:04 EDT 2022. Contains 357237 sequences. (Running on oeis4.)