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A001531 as a simple table

n a(n)
0 1
1 1
2 3
3 7
4 83
5 109950
6 28613442061634
7 32966964611113760521683249750048
8 623226477875973310927522916529663444655632673539934117923988862064800 

[1,1,3,7,83,109950,28613442061634,
 32966964611113760521683249750048,
 62322647787597331092752291652966344465563267353993\
 4117923988862064800]

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Last modified April 25 01:35 EDT 2024. Contains 371964 sequences. (Running on oeis4.)