A152707 - OEIS

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A152707 as a simple table

n	a(n)
1	1
2	2
3	6
4	24
5	120
6	720
7	5040
8	40320
9	362880
10	3386880
11	33755040
12	359677440
13	4104208992
14	50168568768
15	664362282656
16	9530108009664

[1,2,6,24,120,720,5040,40320,362880,3386880, 33755040,359677440,4104208992,50168568768, 664362282656,9530108009664]