A022751 - OEIS

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A022751 as a simple table

n	a(n)
0	1
1	27
2	432
3	5193
4	51624
5	446094
6	3454767
7	24472584
8	160883037
9	992189253
10	5788156617
11	32151489435
12	170956128834
13	873959259258
14	4311311541669
15	20586621297483
16	95404964600448
17	430094901683700

[1,27,432,5193,51624,446094,3454767,24472584, 160883037,992189253,5788156617,32151489435, 170956128834,873959259258,4311311541669, 20586621297483,95404964600448,430094901683700]