A170708 - OEIS

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A170708 as a simple table

n	a(n)
0	1
1	27
2	702
3	18252
4	474552
5	12338352
6	320797152
7	8340725952
8	216858874752
9	5638330743552
10	146596599332352
11	3811511582641152
12	99099301148669952
13	2576581829865418752
14	66991127576500887552
15	1741769316989023076352

[1,27,702,18252,474552,12338352,320797152, 8340725952,216858874752,5638330743552, 146596599332352,3811511582641152, 99099301148669952,2576581829865418752, 66991127576500887552,1741769316989023076352]