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A189002 as a simple table

n a(n)
0 1
1 1
2 2
3 4
4 36
5 192
6 6728
7 100352
8 12988816
9 557568000
10 258584046368
11 32565539635200
12 53060477521960000
13 19872369301840986112
14 112202208776036178000000
15 126231322912498539682594816
16 2444888770250892795802079170816
17 8326627661691818545121844900397056

[1,1,2,4,36,192,6728,100352,12988816,557568000,
 258584046368,32565539635200,53060477521960000,
 19872369301840986112,112202208776036178000000,
 126231322912498539682594816,
 2444888770250892795802079170816,
 8326627661691818545121844900397056]

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Last modified April 25 07:07 EDT 2024. Contains 371964 sequences. (Running on oeis4.)