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A269109 as a simple table

n a(n)
1 4
2 16
3 16
4 60
5 180
6 60
7 216
8 1740
9 1740
10 216
11 756
12 15540
13 40908
14 15540
15 756
16 2592
17 132300
18 872460
19 872460
20 132300
21 2592
22 8748
23 1090740
24 17593092
25 43964700
26 17593092
27 1090740
28 8748
29 29160
30 8787660
31 342055548
32 2085484068
33 2085484068

[4,16,16,60,180,60,216,1740,1740,216,756,15540,
 40908,15540,756,2592,132300,872460,872460,132300,
 2592,8748,1090740,17593092,43964700,17593092,
 1090740,8748,29160,8787660,342055548,2085484068,
 2085484068]

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Last modified May 13 23:41 EDT 2021. Contains 343868 sequences. (Running on oeis4.)