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A216171 as a simple table

n a(n)
1 1
2 1
3 3
4 21
5 181
6 1815
7 20154
8 241665
9 3080331
10 41302128
11 578300961
12 8410381731
13 126533164302
14 1963198249559
15 31334634890994
16 513482316151767
17 8625106767201627
18 148306563373055094
19 2607509241485053311
20 46832500213908831048
21 858557964325898228058

[1,1,3,21,181,1815,20154,241665,3080331,41302128,
 578300961,8410381731,126533164302,1963198249559,
 31334634890994,513482316151767,8625106767201627,
 148306563373055094,2607509241485053311,
 46832500213908831048,858557964325898228058]

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Last modified July 4 20:18 EDT 2024. Contains 374017 sequences. (Running on oeis4.)