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A255254 as a simple table

na(n)
11
21
32
42
53
63
76
810
910
1010
1113
1214
1314
1415
1518
1618
1718
1818
1918
2018
2120
2220
2320
2420
2520
2620
2721
2821
2921
3022
3122
3222
3324
3424
3524
3624
3724
3825
3925
4027
4129
4229
4330
4430
4530
4631
4732
4835
4936
5036
5136
5236
5336
5438
5539
5639
5739
5839
5939
6039
6139
6239
6340
6440
6540
6640
6742

[1,1,2,2,3,3,6,10,10,10,13,14,14,15,18,18,18,18,
 18,18,20,20,20,20,20,20,21,21,21,22,22,22,24,24,
 24,24,24,25,25,27,29,29,30,30,30,31,32,35,36,36,
 36,36,36,38,39,39,39,39,39,39,39,39,40,40,40,40,
 42]