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A112328 as a simple table

n a(n)
1 2
2 18
3 108
4 562
5 2724
6 12660
7 57240
8 253842
9 1109748
10 4798780
11 20572392
12 87580308
13 370706408
14 1561573032
15 6551178288
16 27387484242
17 114146434068
18 474476717292
19 1967642119368
20 8142727008732
21 33634295542968
22 138696447565272

[2,18,108,562,2724,12660,57240,253842,1109748,
 4798780,20572392,87580308,370706408,1561573032,
 6551178288,27387484242,114146434068,474476717292,
 1967642119368,8142727008732,33634295542968,
 138696447565272]

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Last modified April 24 03:08 EDT 2024. Contains 371918 sequences. (Running on oeis4.)