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A000284 as a simple table

n a(n)
0 0
1 1
2 1
3 2
4 9
5 731
6 390617900
7 59601394712394173339000731
8 211723599072542785377729319366442939995427829921816290889198752331804918235791

[0,1,1,2,9,731,390617900,
 59601394712394173339000731,
 21172359907254278537772931936644293999542782992181\
 6290889198752331804918235791]

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Last modified August 6 11:55 EDT 2020. Contains 336246 sequences. (Running on oeis4.)