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A001267 as a simple table

n a(n)
0 0
1 0
2 0
3 0
4 1
5 8
6 60
7 444
8 3599
9 32484
10 325322
11 3582600
12 43029621
13 559774736
14 7841128936
15 117668021988
16 1883347579515
17 32026067455084
18 576605574327174
19 10957672400252944
20 219190037987444577
21 4603645435776504120
22 101292568208941883236
23 2329975164242735146316

[0,0,0,0,1,8,60,444,3599,32484,325322,3582600,
 43029621,559774736,7841128936,117668021988,
 1883347579515,32026067455084,576605574327174,
 10957672400252944,219190037987444577,
 4603645435776504120,101292568208941883236,
 2329975164242735146316]

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