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A064405 as a simple table

na(n)
0-1
1-2
2-1
3-4
41
5-2
6-1
7-8
85
92
103
11-4
125
13-2
14-1
15-16
1613
1710
1811
194
2013
216
227
23-8
2417
2510
2611
27-4
2813
29-2
30-1
31-32
3229
3326
3427
3520
3629
3722
3823
398
4033
4126
4227
4312
4429
4514
4615
47-16
4841
4934
5035
5120
5237
5322
5423
55-8
5641
5726
5827
59-4
6029
61-2
62-1
63-64
6461
6558
6659
6752
6861
6954
7055
7140
7265
7358
7459
7544
7661
7746
7847
7916
8073
8166
8267
8352
8469
8554

[-1,-2,-1,-4,1,-2,-1,-8,5,2,3,-4,5,-2,-1,-16,13,
 10,11,4,13,6,7,-8,17,10,11,-4,13,-2,-1,-32,29,26,
 27,20,29,22,23,8,33,26,27,12,29,14,15,-16,41,34,
 35,20,37,22,23,-8,41,26,27,-4,29,-2,-1,-64,61,58,
 59,52,61,54,55,40,65,58,59,44,61,46,47,16,73,66,
 67,52,69,54]