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A321211 as a simple table

na(n)
11
22
33
43
54
64
75
84
96
106
116
127
137
147
158
167
178
189
199
209
219
228
2310
249
2510
2611
2711
2811
2911
3012
3112
3212
3311
3412
3511
3612
3713
3813
3913
4014
4114
4214
4313
4414
4514
4614
4715
4814
4914
5012
5114
5215
5314
5415
5516
5617
5717
5816
5916
6016
6116
6217
6316
6416
6517
6617
6716
6816
6915
7017
7119

[1,2,3,3,4,4,5,4,6,6,6,7,7,7,8,7,8,9,9,9,9,8,10,9,
 10,11,11,11,11,12,12,12,11,12,11,12,13,13,13,14,
 14,14,13,14,14,14,15,14,14,12,14,15,14,15,16,17,
 17,16,16,16,16,17,16,16,17,17,16,16,15,17,19]