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A048021 as a simple table

n a(n)
1 0
2 0
3 0
4 0
5 1
6 5
7 15
8 30
9 70
10 141
11 213
12 405
13 765
14 1110
15 2310
16 4954
17 7435
18 16575
19 35945
20 52871
21 113815
22 240385
23 346745
24 744345
25 1595433
26 2299998
27 5036862
28 10959446
29 15770601
30 34636245
31 75326163
32 107787262
33 236331302
34 514828047

[0,0,0,0,1,5,15,30,70,141,213,405,765,1110,2310,
 4954,7435,16575,35945,52871,113815,240385,346745,
 744345,1595433,2299998,5036862,10959446,15770601,
 34636245,75326163,107787262,236331302,514828047]

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Last modified January 26 20:57 EST 2021. Contains 340443 sequences. (Running on oeis4.)