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A223522 as a simple table

n a(n)
1 1
2 20
3 1
4 780
5 60
6 1
7 45240
8 4320
9 120
10 1
11 3483480
12 382200
13 13800
14 200
15 1
16 334414080
17 40556880
18 1734600
19 33600
20 300
21 1
22 38457619200
23 5039012160
24 243505080
25 5699400
26 69300
27 420
28 1

[1,20,1,780,60,1,45240,4320,120,1,3483480,382200,
 13800,200,1,334414080,40556880,1734600,33600,300,
 1,38457619200,5039012160,243505080,5699400,69300,
 420,1]

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Last modified March 29 06:34 EDT 2024. Contains 371265 sequences. (Running on oeis4.)