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A261252 as a simple table

na(n)
01
1-1
22
3-4
47
5-10
614
7-22
833
9-45
1062
11-88
12122
13-163
14216
15-290
16386
17-502
18650
19-846
201093
21-1393
221768
23-2248
242844
25-3565
264454
27-5566
286927
29-8566
3010562
31-13014
3215986
33-19543
3423832
35-29032
3635272
37-42700
3851578
39-62226
4074906
41-89909
42107712

[1,-1,2,-4,7,-10,14,-22,33,-45,62,-88,122,-163,
 216,-290,386,-502,650,-846,1093,-1393,1768,-2248,
 2844,-3565,4454,-5566,6927,-8566,10562,-13014,
 15986,-19543,23832,-29032,35272,-42700,51578,
 -62226,74906,-89909,107712]