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A117731 as a simple table

n a(n)
1 1
2 7
3 37
4 533
5 1627
6 18107
7 237371
8 95549
9 1632341
10 155685007
11 156188887
12 3602044091
13 18051406831
14 54260455193
15 225175759291
16 13981692518567
17 14000078506967
18 98115155543129
19 3634060848592973
20 3637485804655193

[1,7,37,533,1627,18107,237371,95549,1632341,
 155685007,156188887,3602044091,18051406831,
 54260455193,225175759291,13981692518567,
 14000078506967,98115155543129,3634060848592973,
 3637485804655193]

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Last modified April 18 15:04 EDT 2021. Contains 343089 sequences. (Running on oeis4.)