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A157311 as a simple table

n a(n)
0 1
1 1
2 1
3 4
4 13
5 66
6 394
7 2759
8 22005
9 198049
10 1979646
11 21776107
12 261287398
13 3396736175
14 47553219799
15 713298307974
16 11412712029909
17 194016104508454
18 3492285524896921
19 66353424973041500
20 1327068107226627278
21 27868430252187313730
22 613105422439139763585

[1,1,1,4,13,66,394,2759,22005,198049,1979646,
 21776107,261287398,3396736175,47553219799,
 713298307974,11412712029909,194016104508454,
 3492285524896921,66353424973041500,
 1327068107226627278,27868430252187313730,
 613105422439139763585]

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Last modified April 18 20:21 EDT 2024. Contains 371781 sequences. (Running on oeis4.)