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A052122 as a simple table

na(n)
00
11
21
31
40
51
6-7
71
8159
9-843
10-1231
112359233
12-13303471
13-271566005
1410142361989
15126956968965
16-10502027401553
1764275615468715
1832481110981976151
19-3014479147788009411
20-147131182752475409229
2114607119841651449406947
221868869263315549659372569

[0,1,1,1,0,1,-7,1,159,-843,-1231,2359233,
 -13303471,-271566005,10142361989,126956968965,
 -10502027401553,64275615468715,32481110981976151,
 -3014479147788009411,-147131182752475409229,
 14607119841651449406947,1868869263315549659372569]