A222844 - OEIS

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A222844 as a simple table

n	a(n)
1	3
2	27
3	576
4	4896
5	63455
6	531864
7	5916807
8	49852089
9	513363015
10	4356708120
11	43202639844
12	369377896383
13	3577597178939
14	30801614053968
15	293760174674232
16	2545094117389824
17	24014459778781840
18	209083911110141112

[3,27,576,4896,63455,531864,5916807,49852089, 513363015,4356708120,43202639844,369377896383, 3577597178939,30801614053968,293760174674232, 2545094117389824,24014459778781840, 209083911110141112]