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A109894 as a simple table

n a(n)
1 1
2 20
3 4620
4 12697776
5 159845400
6 941432800
7 158800433792
8 1895312483064000
9 3438271897004237230080
10 933561026438040
11 2562849175892544
12 640904462719404383808000
13 1528364130975
14 2352733350786
15 959393282698730880000
16 6142080926952

[1,20,4620,12697776,159845400,941432800,
 158800433792,1895312483064000,
 3438271897004237230080,933561026438040,
 2562849175892544,640904462719404383808000,
 1528364130975,2352733350786,959393282698730880000,
 6142080926952]

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Last modified April 24 15:42 EDT 2024. Contains 371960 sequences. (Running on oeis4.)