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A291431 as a simple table

na(n)
113
213
312
413
55
66
77
88
99
105
1111
126
1313
147
155
168
1713
186
1913
205
217
2211
2313
246
255
2613
279
287
2913
305
3113
328
3311
3413
355
366
3713
3813
3912
405
4113
426
4313
4411
455
4613
4713
486
497
505
5112
5213
5313
546
555
567
5712
5813
5913
605
6113
6213
637
648
655
666
6713
6813
6912
705

[13,13,12,13,5,6,7,8,9,5,11,6,13,7,5,8,13,6,13,5,
 7,11,13,6,5,13,9,7,13,5,13,8,11,13,5,6,13,13,12,5,
 13,6,13,11,5,13,13,6,7,5,12,13,13,6,5,7,12,13,13,
 5,13,13,7,8,5,6,13,13,12,5]