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A259017 as a simple table

n a(n)
4 0
5 1
6 172
7 17041
8 1382400
9 104454120
10 7801139200
11 593322510704
12 46672464052224
13 3827977546598400
14 328664453612830720
15 29590252898580000000
16 2794588822832496508928
17 276747699113763664091136
18 28712738456619366481920000
19 3117500646133634877355274240
20 353783948741967872000000000000

[0,1,172,17041,1382400,104454120,7801139200,
 593322510704,46672464052224,3827977546598400,
 328664453612830720,29590252898580000000,
 2794588822832496508928,276747699113763664091136,
 28712738456619366481920000,
 3117500646133634877355274240,
 353783948741967872000000000000]

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Last modified April 23 06:04 EDT 2024. Contains 371906 sequences. (Running on oeis4.)