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A280271 as a simple table

na(n)
01
11
22
33
43
55
65
77
88
99
1011
1112
1214
1316
1418
1520
1623
1725
1829
1932
2036
2140
2244
2349
2454
2559
2665
2770
2876
2983
3089
3198
32105
33114
34123
35132
36143
37154
38165
39178
40190
41204
42219
43234
44251
45267
46285
47304
48324
49345
50368
51390
52415
53441
54468
55498
56527
57559
58591
59626
60663
61702
62742
63784
64828
65873
66923
67973
681026
691081
701138

[1,1,2,3,3,5,5,7,8,9,11,12,14,16,18,20,23,25,29,
 32,36,40,44,49,54,59,65,70,76,83,89,98,105,114,
 123,132,143,154,165,178,190,204,219,234,251,267,
 285,304,324,345,368,390,415,441,468,498,527,559,
 591,626,663,702,742,784,828,873,923,973,1026,1081,
 1138]