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A242246 as a simple table

na(n)
00
11
21
31
40
5-1
60
71
80
9-3
100
115
120
13-691
140
1535
160
17-3617
180
1943867
200
21-1222277
220
23854513
240
25-1181820455
260
2776977927
280
29-23749461029
300
318615641276005
320
33-84802531453387
340
3590219075042845
360

[0,1,1,1,0,-1,0,1,0,-3,0,5,0,-691,0,35,0,-3617,0,
 43867,0,-1222277,0,854513,0,-1181820455,0,
 76977927,0,-23749461029,0,8615641276005,0,
 -84802531453387,0,90219075042845,0]