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A321301 as a simple table

na(n)
11
21
31
42
51
64
75
82
94
107
118
125
134
1410
153
168
1711
181
1913
209
215
2215
239
247
2517
267
2711
2819
297
3013
3121
327
3315
3423
355
3619
3725
383
3923
4027
413
4225
4329
445
4525
4631
475
4827
4933
507
5127
5235
539
5427
5537
569
5729
5839
5911
6029
6141
6213
6329
6443
6517
6627
6745
6825
6921
7047
7133
7215
7349

[1,1,1,2,1,4,5,2,4,7,8,5,4,10,3,8,11,1,13,9,5,15,
 9,7,17,7,11,19,7,13,21,7,15,23,5,19,25,3,23,27,3,
 25,29,5,25,31,5,27,33,7,27,35,9,27,37,9,29,39,11,
 29,41,13,29,43,17,27,45,25,21,47,33,15,49]