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A136156 as a simple table

n a(n)
1 2
2 1
3 2
4 30
5 24
6 1
7 720
8 15
9 560
10 12
11 3628800
12 10
13 479001600
14 360
15 8
16 315
17 20922789888000
18 280
19 6402373705728000
20 6
21 240
22 1814400
23 1124000727777607680000
24 5
25 1596672
26 239500800
27 1478400
28 180
29 304888344611713860501504000000
30 4
31 265252859812191058636308480000000

[2,1,2,30,24,1,720,15,560,12,3628800,10,479001600,
 360,8,315,20922789888000,280,6402373705728000,6,
 240,1814400,1124000727777607680000,5,1596672,
 239500800,1478400,180,
 304888344611713860501504000000,4,
 265252859812191058636308480000000]

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Last modified December 5 01:43 EST 2023. Contains 367565 sequences. (Running on oeis4.)