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A215922 as a simple table

n a(n)
1 2
2 15
3 136
4 12840
5 322768
6 87852626
7 4044766240
8 2227156082842
9 157752739276184
10 148049849095504726
11 14670983946354664200
12 21183598567292002167082
13 2765649842153732133940784
14 5737167377815628378510929822 

[2,15,136,12840,322768,87852626,4044766240,
 2227156082842,157752739276184,148049849095504726,
 14670983946354664200,21183598567292002167082,
 2765649842153732133940784,
 5737167377815628378510929822]

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Last modified July 13 17:55 EDT 2024. Contains 374285 sequences. (Running on oeis4.)