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A291579 as a simple table

na(n)
11
22
33
44
55
66
77
88
99
1010
1111
1212
1313
1412
1513
168
1713
189
1913
2010
2113
2211
2313
248
2513
2612
279
2812
2913
3010
3113
328
3311
3412
3513
369
3713
3812
3913
408
4113
4212
4313
4411
459
4612
4713
488
4913
5010
5113
5212
5313
549
5511
568
5713
5812
5913
6010
6113
6212
639
648
6513
6611
6713
6812
6913
7010

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