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A054948 as a simple table

n a(n)
0 1
1 1
2 2
3 22
4 1688
5 573496
6 738218192
7 3528260038192
8 63547436065854848
9 4400982906402148836736
10 1190477715153930158152163072
11 1270476960212865235273469079407872
12 5381083212549793228422395071641588743168
13 90765858793484859057065439213726376149311958016

[1,1,2,22,1688,573496,738218192,3528260038192,
 63547436065854848,4400982906402148836736,
 1190477715153930158152163072,
 1270476960212865235273469079407872,
 5381083212549793228422395071641588743168,
 90765858793484859057065439213726376149311958016]

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Last modified April 19 13:00 EDT 2021. Contains 343114 sequences. (Running on oeis4.)