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A086198 as a simple table

na(n)
12
23
34
41
51
61
71
89
910
1011
114
1213
137
1415
154
1617
1718
1819
195
207
2122
2223
238
2425
2513
269
272
2829
292
3031
3132
3233
3334
3435
3536
3637
3719
3839
392
4041
4121
4243
432
4445
4523
4647
472
4849
4925
5051
5152
5253
539
5455
557
5657
5729
5859
5930
6061
6162
629
6316
6465
6566
6667
6768
6823
695
7071
7112
7273
7337
7475
7576
7677

[2,3,4,1,1,1,1,9,10,11,4,13,7,15,4,17,18,19,5,7,
 22,23,8,25,13,9,2,29,2,31,32,33,34,35,36,37,19,39,
 2,41,21,43,2,45,23,47,2,49,25,51,52,53,9,55,7,57,
 29,59,30,61,62,9,16,65,66,67,68,23,5,71,12,73,37,
 75,76,77]