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A130767 as a simple table

n a(n)
1 1
2 2
3 9
4 40
5 420
6 2700
7 56595
8 419328
9 8820900
10 88488400
11 2327925600
12 38767286880
13 1912404574080
14 21612951360000
15 644047087612500
16 10985391056640000
17 634391869996684800
18 14046187624838328960
19 764077915447610400000
20 15840110879873280000000
21 755098009918296312668400

[1,2,9,40,420,2700,56595,419328,8820900,88488400,
 2327925600,38767286880,1912404574080,
 21612951360000,644047087612500,10985391056640000,
 634391869996684800,14046187624838328960,
 764077915447610400000,15840110879873280000000,
 755098009918296312668400]

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Last modified April 25 07:07 EDT 2024. Contains 371964 sequences. (Running on oeis4.)