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A020101 as a simple table

n a(n)
0 1
1 1
2 1
3 2
4 4
5 18
6 93
7 588
8 4324
9 36163
10 338611
11 3509240
12 39877721
13 493033635
14 6588722213
15 94638009964
16 1453983971265
17 23792464984331
18 413123710182464
19 7586453586987049
20 146901328548021943
21 2991445235886992291

[1,1,1,2,4,18,93,588,4324,36163,338611,3509240,
 39877721,493033635,6588722213,94638009964,
 1453983971265,23792464984331,413123710182464,
 7586453586987049,146901328548021943,
 2991445235886992291]

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Last modified April 24 13:49 EDT 2024. Contains 371958 sequences. (Running on oeis4.)