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A011754 as a simple table

na(n)
01
12
22
34
43
56
66
75
86
98
109
1113
1210
1311
1414
1515
1611
1714
1814
1917
2017
2120
2219
2322
2416
2518
2624
2730
2825
2925
3025
3126
3226
3334
3429
3532
3627
3734
3836
3932
4028
4139
4238
4339
4434
4534
4645
4738
4841
4933
5041
5146
5242
5335
5439
5542
5639
5740
5842
5948
6056
6156
6249
6357
6456
6551
6645
6747
6855
6955
7064
7168
7258

[1,2,2,4,3,6,6,5,6,8,9,13,10,11,14,15,11,14,14,17,
 17,20,19,22,16,18,24,30,25,25,25,26,26,34,29,32,
 27,34,36,32,28,39,38,39,34,34,45,38,41,33,41,46,
 42,35,39,42,39,40,42,48,56,56,49,57,56,51,45,47,
 55,55,64,68,58]