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A053500 as a simple table

n a(n)
0 1
1 1
2 2
3 4
4 10
5 50
6 220
7 1240
8 6140
9 32860
10 602200
11 5668400
12 62030200
13 522328600
14 4487190800
15 62591332000
16 715163146000
17 9573774122000
18 105731659828000
19 1187355279592000
20 29205778751300000
21 481597207656340000
22 9086318388933400000
23 132525988426667120000

[1,1,2,4,10,50,220,1240,6140,32860,602200,5668400,
 62030200,522328600,4487190800,62591332000,
 715163146000,9573774122000,105731659828000,
 1187355279592000,29205778751300000,
 481597207656340000,9086318388933400000,
 132525988426667120000]

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Last modified June 25 10:09 EDT 2021. Contains 345453 sequences. (Running on oeis4.)