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A220660 as a simple table

na(n)
10
20
31
40
51
62
73
84
95
100
111
122
133
144
155
166
177
188
199
2010
2111
2212
2313
2414
2515
2616
2717
2818
2919
3020
3121
3222
3323
340
351
362
373
384
395
406
417
428
439
4410
4511
4612
4713
4814
4915
5016
5117
5218
5319
5420
5521
5622
5723
5824
5925
6026
6127
6228
6329
6430
6531
6632
6733
6834
6935
7036
7137
7238
7339

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