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A005831 as a simple table

n a(n)
0 0
1 1
2 1
3 2
4 4
5 12
6 60
7 780
8 47580
9 37159980
10 1768109008380
11 65702897157329640780
12 116169884340604934905464739377180
13 7632697963609645128663145969343357330533515068777580
14 886689639639303288926299195509965193299034793881606681727875910370940270908216401980

[0,1,1,2,4,12,60,780,47580,37159980,1768109008380,
 65702897157329640780,
 116169884340604934905464739377180,
 76326979636096451286631459693433573305335150687775\
 80,
 88668963963930328892629919550996519329903479388160\
 6681727875910370940270908216401980]

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Last modified April 28 03:10 EDT 2024. Contains 372020 sequences. (Running on oeis4.)