A222615 - OEIS

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A222615 as a simple table

n	a(n)
1	17
2	615
3	11421
4	1409334
5	43650470
6	5996281816
7	253864183756
8	50378849363475
9	2844661497709464
10	693856544236239459
11	43788284924757109026
12	11378443951727769866855

[17,615,11421,1409334,43650470,5996281816, 253864183756,50378849363475,2844661497709464, 693856544236239459,43788284924757109026, 11378443951727769866855]