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A245818 as a simple table

na(n)
10
20
30
40
50
60
70
81
9-1
100
110
120
130
142
15-1
162
170
180
191
200
211
222
23-1
240
25-1
262
27-1
281
290
30-1
310
322
331
342
351
36-1
370
381
391
402
410
420
432
442
45-1
46-1
47-1
480
491
50-1
511
520
532
54-1
55-1
561
570
583
590
600
610
623
63-1
640
650
660
671
683
69-2
700
710
720
731
742
75-1
762
773
780
792
802
81-4
821
83-1
841
853
864
87-1
880
890
90-2
911
920
931
941
950
960
97-1
981
991
1000

[0,0,0,0,0,0,0,1,-1,0,0,0,0,2,-1,2,0,0,1,0,1,2,-1,
 0,-1,2,-1,1,0,-1,0,2,1,2,1,-1,0,1,1,2,0,0,2,2,-1,
 -1,-1,0,1,-1,1,0,2,-1,-1,1,0,3,0,0,0,3,-1,0,0,0,1,
 3,-2,0,0,0,1,2,-1,2,3,0,2,2,-4,1,-1,1,3,4,-1,0,0,
 -2,1,0,1,1,0,0,-1,1,1,0]