A223571 - OEIS

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A223571 as a simple table

n	a(n)
1	27
2	729
3	16038
4	352836
5	7762392
6	170772624
7	3756997728
8	82653950016
9	1818386900352
10	40004511807744
11	880099259770368
12	19362183714948096
13	425968041728858112
14	9371296918034878464
15	206168532196767326208

[27,729,16038,352836,7762392,170772624,3756997728, 82653950016,1818386900352,40004511807744, 880099259770368,19362183714948096, 425968041728858112,9371296918034878464, 206168532196767326208]