A155209 - OEIS

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A155209 as a simple table

n	a(n)
0	1
1	3
2	117
3	83691
4	1057319541
5	224085796087563
6	785909534807110163445
7	45253898808490419883694669835
8	42530103981310660908750359650219091445
9	649533982980850199063905669772208004250784346635

[1,3,117,83691,1057319541,224085796087563, 785909534807110163445, 45253898808490419883694669835, 42530103981310660908750359650219091445, 649533982980850199063905669772208004250784346635]