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A108957 as a simple table

na(n)
12
23
34
45
56
69
711
812
915
1017
1118
1223
1327
1433
1535
1639
1745
1847
1951
2053
2154
2259
2363
2465
2566
2669
2775
2877
2983
3087
3193
3295
3399
34107
35111
36117
37119
38123
39125
40126
41129
42131
43135
44137
45138
46143
47147
48149
49150
50153
51155
52159
53165
54167
55171
56173
57174
58179
59183
60185
61186

[2,3,4,5,6,9,11,12,15,17,18,23,27,33,35,39,45,47,
 51,53,54,59,63,65,66,69,75,77,83,87,93,95,99,107,
 111,117,119,123,125,126,129,131,135,137,138,143,
 147,149,150,153,155,159,165,167,171,173,174,179,
 183,185,186]