A191364 - OEIS

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A191364 as a simple table

n	a(n)
0	1
1	1
2	2
3	15
4	152
5	2190
6	39894
7	886074
8	23187632
9	699092136
10	23860707480
11	909507899520
12	38295831424872
13	1765316863497720
14	88423030108046256
15	4782130014839166360
16	277730241327729713280
17	17239188136821392859840

[1,1,2,15,152,2190,39894,886074,23187632, 699092136,23860707480,909507899520,38295831424872, 1765316863497720,88423030108046256, 4782130014839166360,277730241327729713280, 17239188136821392859840]