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A212869 as a simple table

n a(n)
1 0
2 1
3 3
4 15
5 52
6 199
7 722
8 2693
9 10052
10 37344
11 141943
12 528323
13 2020746
14 7720299
15 29535575
16 112041465
17 434810382
18 1666519344
19 6447232492
20 24895996003
21 96654652273 

[0,1,3,15,52,199,722,2693,10052,37344,141943,
 528323,2020746,7720299,29535575,112041465,
 434810382,1666519344,6447232492,24895996003,
 96654652273]

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Last modified April 25 03:15 EDT 2024. Contains 371964 sequences. (Running on oeis4.)