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A081181 as a simple table

n a(n)
0 1
1 3
2 6
3 20
4 35
5 126
6 210
7 792
8 1287
9 5005
10 8008
11 31824
12 50388
13 203490
14 319770
15 1307504
16 2042975
17 8436285
18 13123110
19 54627300
20 84672315
21 354817320
22 548354040
23 2310789600
24 3562467300
25 15084504396
26 23206929840
27 98672427616
28 151532656696

[1,3,6,20,35,126,210,792,1287,5005,8008,31824,
 50388,203490,319770,1307504,2042975,8436285,
 13123110,54627300,84672315,354817320,548354040,
 2310789600,3562467300,15084504396,23206929840,
 98672427616,151532656696]

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Last modified June 23 10:38 EDT 2024. Contains 373643 sequences. (Running on oeis4.)