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A264557 as a simple table

n a(n)
1 1
2 1
3 1
4 2
5 4
6 8
7 24
8 72
9 216
10 864
11 3456
12 13824
13 69120
14 345600
15 1728000
16 10368000
17 62208000
18 373248000
19 2612736000
20 18289152000
21 128024064000
22 1024192512000
23 8193540096000
24 65548320768000
25 589934886912000
26 5309413982208000
27 47784725839872000

[1,1,1,2,4,8,24,72,216,864,3456,13824,69120,
 345600,1728000,10368000,62208000,373248000,
 2612736000,18289152000,128024064000,1024192512000,
 8193540096000,65548320768000,589934886912000,
 5309413982208000,47784725839872000]

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Last modified June 24 13:17 EDT 2019. Contains 324325 sequences. (Running on oeis4.)