A231911 - OEIS

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A231911 as a simple table

n	a(n)
1	27
2	315
3	22759
4	1082472
5	57946241
6	3045772177
7	161165375484
8	8510466003024
9	449802159184815
10	23769502516799752
11	1256186406659826887
12	66386821714438890236
13	3508433902346555039384
14	185414720721697789745915

[27,315,22759,1082472,57946241,3045772177, 161165375484,8510466003024,449802159184815, 23769502516799752,1256186406659826887, 66386821714438890236,3508433902346555039384, 185414720721697789745915]