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A204987 as a simple table

na(n)
12
22
33
43
55
63
74
84
97
105
1111
124
1313
144
155
165
179
187
1919
206
217
2211
2312
245
2521
2613
2719
285
2929
305
316
326
3311
349
3513
368
3737
3819
3913
407
4121
427
4315
4412
4513
4612
4724
486
4922
5021
519
5214
5353
5419
5521
566
5719
5829
5959
606
6161
626
637
647
6513
6611
6767
6810
6923
7013
7136
729
7310
7437
7521
7620
7731
7813
7940
808
8155
8221
8383
848
859
8615
8729
8813

[2,2,3,3,5,3,4,4,7,5,11,4,13,4,5,5,9,7,19,6,7,11,
 12,5,21,13,19,5,29,5,6,6,11,9,13,8,37,19,13,7,21,
 7,15,12,13,12,24,6,22,21,9,14,53,19,21,6,19,29,59,
 6,61,6,7,7,13,11,67,10,23,13,36,9,10,37,21,20,31,
 13,40,8,55,21,83,8,9,15,29,13]