A081317 - OEIS

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A081317 as a simple table

n	a(n)
1	13
2	52579
3	8779
4	2161
5	69857
6	909090909090909091
7	459691
8	549797184491917
9	14175966169
10	183411838171
11	296557347313446299
12	388847808493
13	3404193829806058997303
14	8985695684401
15	297262705009139006771611927

[13,52579,8779,2161,69857,909090909090909091, 459691,549797184491917,14175966169,183411838171, 296557347313446299,388847808493, 3404193829806058997303,8985695684401, 297262705009139006771611927]