A109689 - OEIS

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A109689 as a simple table

n	a(n)
0	1
1	1
2	21952
3	5735339
4	4410944
5	3553559576
6	66676466375
7	7707245470777
8	148388768680888
9	999970000299999
10	310810243810243102106210518101010107767
11	1115341111117511141118670443456

[1,1,21952,5735339,4410944,3553559576,66676466375, 7707245470777,148388768680888,999970000299999, 310810243810243102106210518101010107767, 1115341111117511141118670443456]