A184889 - OEIS

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A184889 as a simple table

n	a(n)
0	1
1	30
2	5850
3	1644500
4	542685000
5	196017822000
6	75031266310000
7	29905319000700000
8	12279871614662437500
9	5159062111690898125000
10	2207046771381366217875000
11	958150139674902210123750000

[1,30,5850,1644500,542685000,196017822000, 75031266310000,29905319000700000, 12279871614662437500,5159062111690898125000, 2207046771381366217875000, 958150139674902210123750000]