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A231494 as a simple table

n a(n)
0 1
1 1
2 2
3 9
4 52
5 364
6 2918
7 26138

[1,1,2,9,52,364,2918,26138]

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Last modified January 28 08:03 EST 2023. Contains 359850 sequences. (Running on oeis4.)