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A020116 as a simple table

n a(n)
0 1
1 1
2 2
3 3
4 10
5 45
6 252
7 1666
8 12701
9 109545
10 1054364
11 11202617
12 130230420
13 1644159041
14 22401666927
15 327624378798
16 5119130918713
17 85105551523595
18 1499985345603354
19 27937227061862468
20 548268081089050918

[1,1,2,3,10,45,252,1666,12701,109545,1054364,
 11202617,130230420,1644159041,22401666927,
 327624378798,5119130918713,85105551523595,
 1499985345603354,27937227061862468,
 548268081089050918]

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Last modified May 14 09:14 EDT 2024. Contains 372532 sequences. (Running on oeis4.)