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A353909 as a simple table

na(n)
1-1
21
3-3
46
5-5
65
7-7
820
9-9
109
11-11
1230
13-13
1413
15-15
1672
17-17
1833
19-19
2054
21-21
2221
23-23
24100
25-25
2625
27-27
2878
29-29
3045
31-31
32208
33-33
3433
35-35
36198
37-37
3837
39-39
40180
41-41
4265
43-43
44126
45-45
4645
47-47
48360
49-49
50145
51-51
52150
53-53
54153
55-55
56260
57-57
5857
59-59

[-1,1,-3,6,-5,5,-7,20,-9,9,-11,30,-13,13,-15,72,
 -17,33,-19,54,-21,21,-23,100,-25,25,-27,78,-29,45,
 -31,208,-33,33,-35,198,-37,37,-39,180,-41,65,-43,
 126,-45,45,-47,360,-49,145,-51,150,-53,153,-55,
 260,-57,57,-59]