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A370926 as a simple table

n a(n)
0 1
1 1
2 2
3 6
4 28
5 220
6 2520
7 34510
8 519680
9 8527680
10 154831600
11 3151456000
12 71830281600
13 1809141934600
14 49559087177600
15 1459865188782000
16 45970426027926400
17 1543274016213529600
18 55120521154277779200
19 2088917638216953544000
20 83717918489664018560000

[1,1,2,6,28,220,2520,34510,519680,8527680,
 154831600,3151456000,71830281600,1809141934600,
 49559087177600,1459865188782000,45970426027926400,
 1543274016213529600,55120521154277779200,
 2088917638216953544000,83717918489664018560000]

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Last modified May 15 14:34 EDT 2024. Contains 372540 sequences. (Running on oeis4.)