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A154221 as a simple table

na(n)
01
11
21
31
42
51
61
73
83
91
101
115
125
135
141
151
169
179
189
199
201
211
2217
2317
2417
2517
2617
271
281
2933
3033
3133
3233
3333
3433
351
361
3765
3865
3965
4065
4165
4265
4365
441
451
46129
47129
48129
49129
50129
51129
52129
53129
541
551
56257
57257
58257
59257
60257
61257
62257
63257
64257
651

[1,1,1,1,2,1,1,3,3,1,1,5,5,5,1,1,9,9,9,9,1,1,17,
 17,17,17,17,1,1,33,33,33,33,33,33,1,1,65,65,65,65,
 65,65,65,1,1,129,129,129,129,129,129,129,129,1,1,
 257,257,257,257,257,257,257,257,257,1]