A053302 - OEIS

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A053302 as a simple table

n	a(n)
1	7
2	89
3	887
4	9551
5	31397
6	492113
7	4652353
8	47326693
9	436273009
10	4302407359
11	42652618343
12	738832927927
13	7177162611713
14	90874329411493
15	218209405436543
16	1693182318746371

[7,89,887,9551,31397,492113,4652353,47326693, 436273009,4302407359,42652618343,738832927927, 7177162611713,90874329411493,218209405436543, 1693182318746371]