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A121260 as a simple table

na(n)
10
20
31
41
52
62
73
83
95
105
117
127
138
148
1510
1610
1711
1811
1912
2012
2113
2213
2314
2414
2516
2616
2717
2817
2918
3018
3119
3219
3320
3420
3521
3621
3722
3822
3923
4023
4124
4224
4326
4426
4527
4627
4728
4828
4929
5029
5130
5230
5331
5431
5532
5632
5733
5833
5934
6034
6136
6236
6337
6437
6538
6638
6739
6839
6940
7040
7141
7241
7342
7442

[0,0,1,1,2,2,3,3,5,5,7,7,8,8,10,10,11,11,12,12,13,
 13,14,14,16,16,17,17,18,18,19,19,20,20,21,21,22,
 22,23,23,24,24,26,26,27,27,28,28,29,29,30,30,31,
 31,32,32,33,33,34,34,36,36,37,37,38,38,39,39,40,
 40,41,41,42,42]