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A278520 as a simple table

na(n)
10
20
30
40
50
61
70
80
9-1
102
110
122
130
143
150
160
170
180
190
204
211
224
230
243
25-2
265
27-2
286
290
302
310
320
332
346
35-1
361
370
387
393
406
410
424
430
448
450
468
470
484
49-3
500
514
5210
530
54-1
550
569
575
589
590
604
610
6210
632
640
651
666
670
6812
696
702
710
722
730
7411
75-2
7614
77-2
788
790
808
81-3
8212
830
847
852
8613
877
8812
890
902
91-1
9216
938
9414
953
965
970
980
994
1002
1010
10210
1030
10415
1050
10615
1070
1080
1090
1104
1119
11212
1130
11412

[0,0,0,0,0,1,0,0,-1,2,0,2,0,3,0,0,0,0,0,4,1,4,0,3,
 -2,5,-2,6,0,2,0,0,2,6,-1,1,0,7,3,6,0,4,0,8,0,8,0,
 4,-3,0,4,10,0,-1,0,9,5,9,0,4,0,10,2,0,1,6,0,12,6,
 2,0,2,0,11,-2,14,-2,8,0,8,-3,12,0,7,2,13,7,12,0,2,
 -1,16,8,14,3,5,0,0,4,2,0,10,0,15,0,15,0,0,0,4,9,
 12,0,12]