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A000389 as a simple table

n a(n)
0 0
1 0
2 0
3 0
4 0
5 1
6 6
7 21
8 56
9 126
10 252
11 462
12 792
13 1287
14 2002
15 3003
16 4368
17 6188
18 8568
19 11628
20 15504
21 20349
22 26334
23 33649
24 42504
25 53130
26 65780
27 80730
28 98280
29 118755
30 142506
31 169911
32 201376
33 237336
34 278256
35 324632
36 376992
37 435897
38 501942
39 575757
40 658008
41 749398

[0,0,0,0,0,1,6,21,56,126,252,462,792,1287,2002,
 3003,4368,6188,8568,11628,15504,20349,26334,33649,
 42504,53130,65780,80730,98280,118755,142506,
 169911,201376,237336,278256,324632,376992,435897,
 501942,575757,658008,749398]

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Last modified May 27 00:38 EDT 2018. Contains 304689 sequences. (Running on oeis4.)