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A052653 as a simple table

n a(n)
0 1
1 1
2 2
3 18
4 120
5 1320
6 15120
7 216720
8 3427200
9 62052480
10 1237420800
11 27263174400
12 653837184000
13 17005993804800
14 476080648243200
15 14283727121664000
16 457058345103360000
17 15540339420942336000

[1,1,2,18,120,1320,15120,216720,3427200,62052480,
 1237420800,27263174400,653837184000,
 17005993804800,476080648243200,14283727121664000,
 457058345103360000,15540339420942336000]

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Last modified April 18 10:01 EDT 2024. Contains 371779 sequences. (Running on oeis4.)