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A287513 as a simple table

na(n)
11
22
33
44
55
66
77
88
99
1010
1113
1214
1316
1417
1519
1623
1725
1829
1931
2032
2134
2235
2337
2438
2541
2643
2747
2849
2952
3053
3156
3258
3359
3461
3565
3667
3771
3873
3974
4076
4179
4283
4385
4489
4591
4692
4794
4895
4997
5098
51112
52113
53115
54116
55118
56119
57121
58125
59127
60131
61133
62134
63136
64137

[1,2,3,4,5,6,7,8,9,10,13,14,16,17,19,23,25,29,31,
 32,34,35,37,38,41,43,47,49,52,53,56,58,59,61,65,
 67,71,73,74,76,79,83,85,89,91,92,94,95,97,98,112,
 113,115,116,118,119,121,125,127,131,133,134,136,
 137]