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A246795 as a simple table

na(n)
21
31
42
53
65
75
87
98
109
118
1212
1310
1411
1512
169
1712
1815
1910
2011
2115
2210
2317
2413
2516
2620
2717
2821
2919
3019
3124
3213
3323
3418
3521
3617
3726
3826
3929
4019
4123
4223
4325
4427
4527
4629
4724
4826
4925
5033
5128
5232
5332
5431
5536
5635
5737
5842
5933
6028
6135
6230
6336
6430
6534
6644
6729
6832
6934
7033
7130
7240
7338
7434
7544

[1,1,2,3,5,5,7,8,9,8,12,10,11,12,9,12,15,10,11,15,
 10,17,13,16,20,17,21,19,19,24,13,23,18,21,17,26,
 26,29,19,23,23,25,27,27,29,24,26,25,33,28,32,32,
 31,36,35,37,42,33,28,35,30,36,30,34,44,29,32,34,
 33,30,40,38,34,44]