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A214283 as a simple table

na(n)
10
2-1
3-2
4-3
5-4
6-10
7-20
8-35
9-56
10-126
11-252
12-462
13-792
14-1716
15-3432
16-6435
17-11440
18-24310
19-48620
20-92378
21-167960
22-352716
23-705432
24-1352078
25-2496144
26-5200300
27-10400600
28-20058300
29-37442160
30-77558760
31-155117520
32-300540195

[0,-1,-2,-3,-4,-10,-20,-35,-56,-126,-252,-462,
 -792,-1716,-3432,-6435,-11440,-24310,-48620,
 -92378,-167960,-352716,-705432,-1352078,-2496144,
 -5200300,-10400600,-20058300,-37442160,-77558760,
 -155117520,-300540195]