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A120589 as a simple table

n a(n)
0 1
1 2
2 3
3 6
4 15
5 42
6 126
7 396
8 1287
9 4290
10 14586
11 50388
12 176358
13 624036
14 2228700
15 8023320
16 29084535
17 106073010
18 388934370
19 1432916100
20 5301789570
21 19692361260
22 73398801060
23 274447690920
24 1029178840950
25 3869712441972
26 14585839204356

[1,2,3,6,15,42,126,396,1287,4290,14586,50388,
 176358,624036,2228700,8023320,29084535,106073010,
 388934370,1432916100,5301789570,19692361260,
 73398801060,274447690920,1029178840950,
 3869712441972,14585839204356]

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Last modified July 25 19:28 EDT 2021. Contains 346291 sequences. (Running on oeis4.)