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A073749 as a simple table

na(n)
01
11
21
33
43
55
611
719
87
939
1039
1137
12243
13451
14-149
15845
16237
171507
18-1569
198599
20-7037
2122543
22-27921
2345765
24-630845
251283427
26-1552973
274462097
28-6470191
298313975
30-43768763
3167084957
32-86965863
33247812897
34-351911967
35477950179
36-5373020297
377552589095
38-10293397313
3929278400177

[1,1,1,3,3,5,11,19,7,39,39,37,243,451,-149,845,
 237,1507,-1569,8599,-7037,22543,-27921,45765,
 -630845,1283427,-1552973,4462097,-6470191,8313975,
 -43768763,67084957,-86965863,247812897,-351911967,
 477950179,-5373020297,7552589095,-10293397313,
 29278400177]