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A057899 as a simple table

na(n)
12
22
34
45
52
67
73
89
910
1011
1112
122
1314
144
1516
1617
1718
1819
1920
2021
2122
2223
235
243
2526
2627
272
2829
2930
3031
3132
3233
3334
346
3536
3637
3738
3839
3940
4041
4142
4243
4344
4445
4546
4647
477
4849
4950
5051
5152
5253
5354
5455
5556
5657
5758
582
5960
6061
614
628
6364
6465
6566
6667
6768
6869
6970
7071
7172
7273
7374
7475
7576

[2,2,4,5,2,7,3,9,10,11,12,2,14,4,16,17,18,19,20,
 21,22,23,5,3,26,27,2,29,30,31,32,33,34,6,36,37,38,
 39,40,41,42,43,44,45,46,47,7,49,50,51,52,53,54,55,
 56,57,58,2,60,61,4,8,64,65,66,67,68,69,70,71,72,
 73,74,75,76]