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A167022 as a simple table

na(n)
01
1-1
2-2
3-2
4-4
5-8
6-18
7-42
8-102
9-254
10-646
11-1670
12-4376
13-11596
14-31022
15-83670
16-227268
17-621144
18-1706934
19-4713558
20-13072764
21-36398568
22-101704038
23-285095118
24-801526446
25-2259520830
26-6385455594
27-18086805002
28-51339636952
29-146015545604

[1,-1,-2,-2,-4,-8,-18,-42,-102,-254,-646,-1670,
 -4376,-11596,-31022,-83670,-227268,-621144,
 -1706934,-4713558,-13072764,-36398568,-101704038,
 -285095118,-801526446,-2259520830,-6385455594,
 -18086805002,-51339636952,-146015545604]