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A276731 as a simple table

na(n)
12
23
35
48
511
68
717
826
923
1029
1135
1226
1341
1435
1547
1653
1759
1862
1962
2071
2180
2262
2383
2489
25116
26101
27116
28107
29107
30113
31107
32131
33137
34116
35149
36170
37143
38188
39167
40173
41179
42188
43191
44170
45197
46188
47224
48251
49227
50251
51233
52239
53224
54251
55257
56263
57269
58242
59251
60281

[2,3,5,8,11,8,17,26,23,29,35,26,41,35,47,53,59,62,
 62,71,80,62,83,89,116,101,116,107,107,113,107,131,
 137,116,149,170,143,188,167,173,179,188,191,170,
 197,188,224,251,227,251,233,239,224,251,257,263,
 269,242,251,281]