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A257989 as a simple table

na(n)
2-1
32
4-2
53
60
74
8-3
92
100
115
12-2
136
140
153
16-4
177
181
198
20-1
214
220
239
24-3
253
260
272
28-1
2910
301
3111
32-5
335
340
354
36-2
3712
380
396
40-3
4113
421
4314
44-1
453
460
4715
48-4
494
501
517
52-1
5316
542
555
56-2
578
580
5917
60-1
6118
620
634
64-6
656
661
6719
68-1
699
701
7120
72-3
7321
740
753
76-1
775
781
7922
80-4
812
820
8323
84-1
857
860
8710
88-2
8924
902
916
92-1

[-1,2,-2,3,0,4,-3,2,0,5,-2,6,0,3,-4,7,1,8,-1,4,0,
 9,-3,3,0,2,-1,10,1,11,-5,5,0,4,-2,12,0,6,-3,13,1,
 14,-1,3,0,15,-4,4,1,7,-1,16,2,5,-2,8,0,17,-1,18,0,
 4,-6,6,1,19,-1,9,1,20,-3,21,0,3,-1,5,1,22,-4,2,0,
 23,-1,7,0,10,-2,24,2,6,-1]