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A281320 as a simple table

n a(n)
1 0
2 2
3 28
4 304
5 2976
6 27488
7 244544
8 2119168
9 18011136
10 150809088
11 1247857664
12 10226274304
13 83138240512
14 671370043392
15 5390483210240
16 43066315243520
17 342583723687936
18 2714813886234624
19 21440990518444032
20 168825545758343168

[0,2,28,304,2976,27488,244544,2119168,18011136,
 150809088,1247857664,10226274304,83138240512,
 671370043392,5390483210240,43066315243520,
 342583723687936,2714813886234624,
 21440990518444032,168825545758343168]

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Last modified July 30 23:49 EDT 2024. Contains 374771 sequences. (Running on oeis4.)