A299224 - OEIS

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A299224 as a simple table

n	a(n)
1	2
2	61
3	628
4	5663
5	51862
6	486305
7	4532025
8	42210111
9	393354513
10	3665540260
11	34156287528
12	318279356683
13	2965838291898
14	27636672383375
15	257527745652155
16	2399729999704478
17	22361489149827987
18	208371854494502461

[2,61,628,5663,51862,486305,4532025,42210111, 393354513,3665540260,34156287528,318279356683, 2965838291898,27636672383375,257527745652155, 2399729999704478,22361489149827987, 208371854494502461]