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A142704 as a simple table

n a(n)
0 0
1 1
2 1
3 6
4 16
5 70
6 264
7 1204
8 5344
9 26424
10 130960
11 698896
12 3777216
13 21576256
14 125331136
15 760604160
16 4701036544
17 30121800064
18 196619065344
19 1323267791104
20 9069634616320
21 63835247970816
22 457287705926656

[0,1,1,6,16,70,264,1204,5344,26424,130960,698896,
 3777216,21576256,125331136,760604160,4701036544,
 30121800064,196619065344,1323267791104,
 9069634616320,63835247970816,457287705926656]

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Last modified April 25 01:35 EDT 2024. Contains 371964 sequences. (Running on oeis4.)