A197177 - OEIS

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A197177 as a simple table

n	a(n)
1	4
2	58
3	665
4	7172
5	92206
6	1096217
7	13530178
8	164914460
9	2020163498
10	24703508188
11	302309943629
12	3698448129411
13	45252432505040
14	553659760056682
15	6774120187730445
16	82881818656461776
17	1014068105098968313

[4,58,665,7172,92206,1096217,13530178,164914460, 2020163498,24703508188,302309943629,3698448129411, 45252432505040,553659760056682,6774120187730445, 82881818656461776,1014068105098968313]