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A331851 as a simple table

na(n)
01
11
22
32
42
54
63
73
82
95
104
117
123
137
144
155
162
176
185
199
204
217
227
2311
243
259
267
2711
284
2911
306
317
322
337
346
3511
365
3711
389
3914
404
4111
427
4315
447
4515
4611
4717
483
4911
509
5113
527
5315
5411
5519
564
5714
5811
5919
606
6117
628
6311
642
658
667
6713
686
6913
7011
7117
725
7310
7411
7521
769

[1,1,2,2,2,4,3,3,2,5,4,7,3,7,4,5,2,6,5,9,4,7,7,11,
 3,9,7,11,4,11,6,7,2,7,6,11,5,11,9,14,4,11,7,15,7,
 15,11,17,3,11,9,13,7,15,11,19,4,14,11,19,6,17,8,
 11,2,8,7,13,6,13,11,17,5,10,11,21,9]