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A225827 as a simple table

n a(n)
0 1
1 6
2 24
3 168
4 1120
5 8640
6 66816
7 529920
8 4212736
9 33632256
10 268713984
11 2148630528
12 17184194560
13 137456517120
14 1099579785216
15 8796367749120
16 70369826308096
17 562954298720256
18 4503616874348544
19 36028866141093888
20 288230651566489600
21 2305844111946547200

[1,6,24,168,1120,8640,66816,529920,4212736,
 33632256,268713984,2148630528,17184194560,
 137456517120,1099579785216,8796367749120,
 70369826308096,562954298720256,4503616874348544,
 36028866141093888,288230651566489600,
 2305844111946547200]

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Last modified November 21 09:14 EST 2019. Contains 329362 sequences. (Running on oeis4.)