A128788 - OEIS

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A128788 as a simple table

n	a(n)
0	0
1	9
2	324
3	6561
4	104976
5	1476225
6	19131876
7	234365481
8	2754990144
9	31381059609
10	348678440100
11	3797108212689
12	40669853253264
13	429575324987601
14	4483851321172356
15	46325504721296025
16	474373168346071296

[0,9,324,6561,104976,1476225,19131876,234365481, 2754990144,31381059609,348678440100,3797108212689, 40669853253264,429575324987601,4483851321172356, 46325504721296025,474373168346071296]