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A319950 as a simple table

n a(n)
1 1
2 3
3 15
4 90
5 720
6 7200
7 79200
8 1029600
9 15444000
10 247104000
11 4447872000
12 88957440000
13 1868106240000
14 42966443520000
15 1074161088000000
16 27928188288000000
17 781989272064000000
18 23459678161920000000
19 727250023019520000000
20 23999250759644160000000

[1,3,15,90,720,7200,79200,1029600,15444000,
 247104000,4447872000,88957440000,1868106240000,
 42966443520000,1074161088000000,27928188288000000,
 781989272064000000,23459678161920000000,
 727250023019520000000,23999250759644160000000]

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Last modified April 25 06:49 EDT 2024. Contains 371964 sequences. (Running on oeis4.)