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A163131 as a simple table

n a(n)
1 3
2 75
3 969
4 8964
5 66975
6 429096
7 2442372
8 12640320
9 60454713
10 270391857
11 1141260315
12 4578160257
13 17554638039
14 64642406670
15 229486544439
16 788018124312
17 2624648438025
18 8499852952224
19 26820711864657
20 82613109082410

[3,75,969,8964,66975,429096,2442372,12640320,
 60454713,270391857,1141260315,4578160257,
 17554638039,64642406670,229486544439,788018124312,
 2624648438025,8499852952224,26820711864657,
 82613109082410]

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Last modified April 18 10:01 EDT 2024. Contains 371779 sequences. (Running on oeis4.)