A177752 - OEIS

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A177752 as a simple table

n	a(n)
0	1
1	1
2	1
3	7
4	103
5	2461
6	85236
7	4017959
8	247296043
9	19273646845
10	1856844859198
11	216816668773915
12	30183137125497500
13	4940046471894678145
14	939290181452023884094
15	205341788464993702617408

[1,1,1,7,103,2461,85236,4017959,247296043, 19273646845,1856844859198,216816668773915, 30183137125497500,4940046471894678145, 939290181452023884094,205341788464993702617408]