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A121586 as a simple table

n a(n)
0 1
1 1
2 3
3 13
4 70
5 446
6 3276
7 27252
8 253296
9 2602224
10 29288160
11 358457760
12 4740577920
13 67375532160
14 1024208720640
15 16583626886400
16 284953145702400
17 5178968115148800
18 99268112350310400
19 2001336861359001600
20 42337994134947840000
21 937755916997437440000

[1,1,3,13,70,446,3276,27252,253296,2602224,
 29288160,358457760,4740577920,67375532160,
 1024208720640,16583626886400,284953145702400,
 5178968115148800,99268112350310400,
 2001336861359001600,42337994134947840000,
 937755916997437440000]

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Last modified May 20 05:07 EDT 2024. Contains 372703 sequences. (Running on oeis4.)