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A131892 as a simple table

n a(n)
0 1
1 1
2 6
3 15
4 20
5 15
6 6
7 1
8 36
9 540
10 4320
11 19440
12 46656
13 46656
14 699840
15 4374000
16 14580000
17 27337500
18 27337500
19 11390625
20 91125000
21 303750000
22 540000000
23 540000000
24 288000000
25 64000000
26 288000000
27 540000000
28 540000000
29 303750000
30 91125000
31 11390625
32 27337500

[1,1,6,15,20,15,6,1,36,540,4320,19440,46656,46656,
 699840,4374000,14580000,27337500,27337500,
 11390625,91125000,303750000,540000000,540000000,
 288000000,64000000,288000000,540000000,540000000,
 303750000,91125000,11390625,27337500]

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Last modified August 21 06:54 EDT 2019. Contains 326162 sequences. (Running on oeis4.)