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A009778 as a simple table

na(n)
00
11
21
30
44
5-5
6-9
7196
8-1280
94509
1012565
11-386144
123804516
13-19339385
14-75459461
153162527460
16-41545303904
17276166431961
181385435722185
19-73547738586656
201207721984518180
21-9917136571683789
22-60806773846655969

[0,1,1,0,4,-5,-9,196,-1280,4509,12565,-386144,
 3804516,-19339385,-75459461,3162527460,
 -41545303904,276166431961,1385435722185,
 -73547738586656,1207721984518180,
 -9917136571683789,-60806773846655969]