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A162721 as a simple table

na(n)
12
23
34
45
57
68
711
813
916
1017
1119
1223
1327
1429
1531
1632
1737
1841
1943
2047
2153
2254
2359
2461
2563
2664
2767
2871
2973
3079
3183
3289
3397
34101
35103
36107
37108
38109
39113
40125
41126
42127
43128
44131
45137
46139
47149
48151
49157
50163
51167
52173
53175
54179
55181
56191
57193
58197
59199
60211
61216
62223
63227
64229
65233
66239
67241
68243
69245
70251
71252
72256

[2,3,4,5,7,8,11,13,16,17,19,23,27,29,31,32,37,41,
 43,47,53,54,59,61,63,64,67,71,73,79,83,89,97,101,
 103,107,108,109,113,125,126,127,128,131,137,139,
 149,151,157,163,167,173,175,179,181,191,193,197,
 199,211,216,223,227,229,233,239,241,243,245,251,
 252,256]