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A248110 as a simple table

na(n)
12
23
34
44
55
66
75
86
97
108
116
127
138
149
1510
167
178
189
1910
2011
2112
228
239
2410
2511
2612
2713
2814
299
3010
3111
3212
3313
3414
3515
3616
3710
3811
3912
4013
4114
4215
4316
4417
4518
4611
4712
4813
4913
5014
5115
5214
5315
5416
5517
5615
5716
5817
5918
6019
6116
6217
6318
6419
6520
6621
6717
6818
6919
7020

[2,3,4,4,5,6,5,6,7,8,6,7,8,9,10,7,8,9,10,11,12,8,
 9,10,11,12,13,14,9,10,11,12,13,14,15,16,10,11,12,
 13,14,15,16,17,18,11,12,13,13,14,15,14,15,16,17,
 15,16,17,18,19,16,17,18,19,20,21,17,18,19,20]