A355458 - OEIS

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A355458 as a simple table

n	a(n)
1	1
2	7
3	111
4	3367
5	7787
6	8517
7	9071
8	54079
9	54451
10	138657
11	262157
12	759461
13	857817
14	4662317
15	21754021
16	25400729
17	41171387
18	50304331
19	368119693
20	799245603
21	938577991

[1,7,111,3367,7787,8517,9071,54079,54451,138657, 262157,759461,857817,4662317,21754021,25400729, 41171387,50304331,368119693,799245603,938577991]