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A171450 as a simple table

n a(n)
0 1
1 1
2 2
3 5
4 15
5 54
6 231
7 1133
8 6082
9 34397
10 200063
11 1180798
12 7023103
13 41946973
14 251144922
15 1505966757
16 9040214223
17 54314351878
18 326565963479
19 1964805696525
20 11828911080050
21 71258494789421
22 429525155047263
23 2590571415647886

[1,1,2,5,15,54,231,1133,6082,34397,200063,1180798,
 7023103,41946973,251144922,1505966757,9040214223,
 54314351878,326565963479,1964805696525,
 11828911080050,71258494789421,429525155047263,
 2590571415647886]

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Last modified October 23 08:40 EDT 2021. Contains 348211 sequences. (Running on oeis4.)