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A277728 as a simple table

na(n)
12
24
38
415
517
619
721
826
928
1032
1135
1239
1341
1446
1548
1652
1759
1861
1963
2065
2170
2272
2376
2478
2583
2685
2789
2892
2996
30100
31102
32107
33109
34113
35116
36120
37122
38127
39129
40133
41140
42144
43146
44151
45153
46157
47159
48164
49166
50170
51173
52177
53181
54184
55188
56190
57195
58197
59201
60203
61208
62210
63212
64214
65221

[2,4,8,15,17,19,21,26,28,32,35,39,41,46,48,52,59,
 61,63,65,70,72,76,78,83,85,89,92,96,100,102,107,
 109,113,116,120,122,127,129,133,140,144,146,151,
 153,157,159,164,166,170,173,177,181,184,188,190,
 195,197,201,203,208,210,212,214,221]