A228277 - OEIS

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A228277 as a simple table

n	a(n)
1	1
2	1
3	13
4	133
5	3631
6	172082
7	16566199
8	3057290265
9	1105411581741
10	776531523355217
11	1063228770141145384
12	2834013489992345694498
13	14712337761578682394367473
14	148727865257442275211424889367

[1,1,13,133,3631,172082,16566199,3057290265, 1105411581741,776531523355217,1063228770141145384, 2834013489992345694498,14712337761578682394367473, 148727865257442275211424889367]