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A252474 as a simple table

na(n)
11
22
33
44
55
66
77
88
99
1010
1111
1212
1314
1415
1516
1617
1718
1819
1920
2021
2122
2223
2324
2425
2526
2627
2728
2829
2930
3032
3133
3235
3336
3437
3538
3639
3740
3841
3942
4043
4144
4245
4346
4447
4548
4649
4750
4852
4953
5055
5157
5259
5360
5461

[1,2,3,4,5,6,7,8,9,10,11,12,14,15,16,17,18,19,20,
 21,22,23,24,25,26,27,28,29,30,32,33,35,36,37,38,
 39,40,41,42,43,44,45,46,47,48,49,50,52,53,55,57,
 59,60,61]