A037963 - OEIS

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A037963 as a simple table

n	a(n)
0	0
1	1
2	126
3	5796
4	186480
5	5103000
6	129230640
7	3162075840
8	76592355840
9	1863435974400
10	45950224320000
11	1155068769254400
12	29708792431718400
13	783699448602470400
14	21234672840116736000
15	591499300737945600000

[0,1,126,5796,186480,5103000,129230640,3162075840, 76592355840,1863435974400,45950224320000, 1155068769254400,29708792431718400, 783699448602470400,21234672840116736000, 591499300737945600000]