A228973 - OEIS

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A228973 as a simple table

n	a(n)
1	27
2	729
3	19503
4	485397
5	11824875
6	284888979
7	6833010879
8	163568332743
9	3912114851403
10	93531877981317
11	2235810654452229
12	53441462708600373
13	1277342856184156383
14	30530250826564614987
15	729710332031305316823

[27,729,19503,485397,11824875,284888979, 6833010879,163568332743,3912114851403, 93531877981317,2235810654452229,53441462708600373, 1277342856184156383,30530250826564614987, 729710332031305316823]