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A276527 as a simple table

na(n)
01
1-1
21
3-3
45
5-8
612
7-21
837
9-59
1092
11-153
12256
13-409
14654
15-1073
161754
17-2824
184552
19-7394
2012010
21-19406
2231337
23-50782
2482306
25-133072
26215152
27-348346
28563939
29-912217
301475604
31-2388075
323864808
33-6252750
3410115987
35-16369340
3626488326
37-42857128

[1,-1,1,-3,5,-8,12,-21,37,-59,92,-153,256,-409,
 654,-1073,1754,-2824,4552,-7394,12010,-19406,
 31337,-50782,82306,-133072,215152,-348346,563939,
 -912217,1475604,-2388075,3864808,-6252750,
 10115987,-16369340,26488326,-42857128]