A152479 - OEIS

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A152479 as a simple table

n	a(n)
1	1
2	1
3	1
4	2
5	6
6	42
7	924
8	93324
9	73912608
10	909864204480
11	410599878740916480
12	20528320742539954765344000
13	462721784193718931971550165554080000
14	28136323479948516473366521258111350797954332320000

[1,1,1,2,6,42,924,93324,73912608,909864204480, 410599878740916480,20528320742539954765344000, 462721784193718931971550165554080000, 28136323479948516473366521258111350797954332320000\ ]