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A000274 as a simple table

n a(n)
1 0
2 0
3 1
4 3
5 18
6 110
7 795
8 6489
9 59332
10 600732
11 6674805
12 80765135
13 1057289046
14 14890154058
15 224497707343
16 3607998868005
17 61576514013960
18 1112225784377144
19 21197714949305577
20 425131949816628507
21 8950146311929021210

[0,0,1,3,18,110,795,6489,59332,600732,6674805,
 80765135,1057289046,14890154058,224497707343,
 3607998868005,61576514013960,1112225784377144,
 21197714949305577,425131949816628507,
 8950146311929021210]

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Last modified April 25 01:06 EDT 2024. Contains 371964 sequences. (Running on oeis4.)