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A248157 as a simple table

na(n)
01
1-2
21
30
4-1
52
6-3
74
8-5
96
10-7
118
12-9
1310
14-11
1512
16-13
1714
18-15
1916
20-17
2118
22-19
2320
24-21
2522
26-23
2724
28-25
2926
30-27
3128
32-29
3330
34-31
3532
36-33
3734
38-35
3936
40-37
4138
42-39
4340
44-41
4542
46-43
4744
48-45
4946
50-47
5148
52-49
5350
54-51
5552
56-53
5754
58-55
5956
60-57

[1,-2,1,0,-1,2,-3,4,-5,6,-7,8,-9,10,-11,12,-13,14,
 -15,16,-17,18,-19,20,-21,22,-23,24,-25,26,-27,28,
 -29,30,-31,32,-33,34,-35,36,-37,38,-39,40,-41,42,
 -43,44,-45,46,-47,48,-49,50,-51,52,-53,54,-55,56,
 -57]