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A004340 as a simple table

n a(n)
10 1
11 44
12 1128
13 22100
14 367290
15 5461512
16 74974368
17 969443904
18 11969016345
19 142466675900
20 1646492110120
21 18574174153080
22 205371886988268
23 2232785266876080
24 23929614612052080
25 253338471349988640

[1,44,1128,22100,367290,5461512,74974368,
 969443904,11969016345,142466675900,1646492110120,
 18574174153080,205371886988268,2232785266876080,
 23929614612052080,253338471349988640]

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Last modified September 20 18:52 EDT 2021. Contains 347588 sequences. (Running on oeis4.)