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A277187 as a simple table

na(n)
12
23
34
45
57
68
79
811
913
1017
1119
1223
1325
1427
1529
1631
1736
1837
1941
2043
2147
2249
2353
2459
2561
2667
2771
2873
2979
3083
3189
3297
33101
34103
35107
36109
37113
38121
39125
40127
41131
42137
43139
44149
45151
46157
47163
48167
49169
50173
51179
52181
53191
54193
55197
56199
57211
58223
59227
60229
61233
62239
63241
64251
65257
66263
67269
68271
69277
70281
71283
72289
73293

[2,3,4,5,7,8,9,11,13,17,19,23,25,27,29,31,36,37,
 41,43,47,49,53,59,61,67,71,73,79,83,89,97,101,103,
 107,109,113,121,125,127,131,137,139,149,151,157,
 163,167,169,173,179,181,191,193,197,199,211,223,
 227,229,233,239,241,251,257,263,269,271,277,281,
 283,289,293]