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A196837 as a simple table

na(n)
11
22
3-3
43
5-12
611
74
8-30
970
10-50
115
12-60
13255
14-450
15274
166
17-105
18700
19-2205
203248
21-1764
227
23-168
241610
25-7840
2620307
27-26264
2813068
298
30-252
313276
32-22680
3389796
34-201852
35236248
36-109584
379
38-360
396090
40-56700
41316365
42-1077300
432171040
44-2345400
451026576
4610
47-495
4810560
49-127050
50946638
51-4510275
5213667720
53-25228500
5425507152
55-10628640

[1,2,-3,3,-12,11,4,-30,70,-50,5,-60,255,-450,274,
 6,-105,700,-2205,3248,-1764,7,-168,1610,-7840,
 20307,-26264,13068,8,-252,3276,-22680,89796,
 -201852,236248,-109584,9,-360,6090,-56700,316365,
 -1077300,2171040,-2345400,1026576,10,-495,10560,
 -127050,946638,-4510275,13667720,-25228500,
 25507152,-10628640]