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A297990 as a simple table

n a(n)
1 3
2 166
3 424
4 1446
5 5100
6 18189
7 62390
8 213997
9 735000
10 2520806
11 8673171
12 29895212
13 103062319
14 355448168
15 1226378689
16 4232831248
17 14614818621
18 50474934066
19 174362780682
20 602441004444
21 2081828199132
22 7195055390173
23 24869853343749

[3,166,424,1446,5100,18189,62390,213997,735000,
 2520806,8673171,29895212,103062319,355448168,
 1226378689,4232831248,14614818621,50474934066,
 174362780682,602441004444,2081828199132,
 7195055390173,24869853343749]

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Last modified April 16 02:41 EDT 2024. Contains 371696 sequences. (Running on oeis4.)