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A309121 as a simple table

na(n)
12
22
31
42
52
62
72
82
93
103
112
123
134
142
153
164
173
184
193
204
215
224
234
243
255
265
274
286
295
305
313
325
337
347
354
365
377
384
397
406
416
426
437
447
458
465
476
486
4911
504
515
529
538
548
559
567
578
587
598
607
619
627
6311
646
659
669
6711
689
697
707
7111
7211
7310
749
758
769
777
7811
799
8012
819
8212
8311
8411
8510
8610
8710
8812
8911
9013
919
9210
9311
9412

[2,2,1,2,2,2,2,2,3,3,2,3,4,2,3,4,3,4,3,4,5,4,4,3,
 5,5,4,6,5,5,3,5,7,7,4,5,7,4,7,6,6,6,7,7,8,5,6,6,
 11,4,5,9,8,8,9,7,8,7,8,7,9,7,11,6,9,9,11,9,7,7,11,
 11,10,9,8,9,7,11,9,12,9,12,11,11,10,10,10,12,11,
 13,9,10,11,12]