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A280693 as a simple table

na(n)
11
22
33
44
55
66
77
89
911
1013
1115
1217
1319
1421
1523
1625
1729
1831
1935
2037
2141
2243
2347
2449
2550
2652
2753
2855
2959
3061
3165
3266
3367
3471
3573
3677
3779
3883
3985
4089
4191
4295
4397
44101
45103
46107
47109
48113
49115
50119
51121
52127
53131
54133
55137
56139
57143
58149
59151
60157
61161
62163
63167
64169
65173
66179
67181
68186
69187
70191
71193
72197
73199
74203

[1,2,3,4,5,6,7,9,11,13,15,17,19,21,23,25,29,31,35,
 37,41,43,47,49,50,52,53,55,59,61,65,66,67,71,73,
 77,79,83,85,89,91,95,97,101,103,107,109,113,115,
 119,121,127,131,133,137,139,143,149,151,157,161,
 163,167,169,173,179,181,186,187,191,193,197,199,
 203]