A191505 - OEIS

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A191505 as a simple table

n	a(n)
0	1
1	1
2	1
3	4
4	75
5	7636
6	4866965
7	22256484426
8	827473662052359
9	280073424855627741304
10	956136927041635596586248969
11	36146438316110599447497305174316790
12	16486165931975571004114967909531846539984907

[1,1,1,4,75,7636,4866965,22256484426, 827473662052359,280073424855627741304, 956136927041635596586248969, 36146438316110599447497305174316790, 16486165931975571004114967909531846539984907]