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A229679 as a simple table

n a(n)
1 0
2 2
3 36
4 360
5 2688
6 17280
7 101376
8 559104
9 2949120
10 15040512
11 74711040
12 363331584
13 1736441856
14 8178892800
15 38050725888
16 175154135040
17 798863917056
18 3614214979584
19 16234976378880
20 72464688218112
21 321607151124480

[0,2,36,360,2688,17280,101376,559104,2949120,
 15040512,74711040,363331584,1736441856,8178892800,
 38050725888,175154135040,798863917056,
 3614214979584,16234976378880,72464688218112,
 321607151124480]

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Last modified August 7 19:57 EDT 2020. Contains 336279 sequences. (Running on oeis4.)