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A047820 as a simple table

na(n)
14
26
38
49
510
612
716
818
920
1022
1124
1225
1327
1432
1534
1636
1740
1844
1948
2049
2150
2254
2358
2464
2568
2672
2780
2881
2982
3088
3196
32100
33108
34116
35118
36121
37125
38128
39136
40142
41144
42160
43162
44164
45165
46169
47176
48192
49200
50202
51210
52214
53216
54232
55236
56242
57243
58250
59256
60272

[4,6,8,9,10,12,16,18,20,22,24,25,27,32,34,36,40,
 44,48,49,50,54,58,64,68,72,80,81,82,88,96,100,108,
 116,118,121,125,128,136,142,144,160,162,164,165,
 169,176,192,200,202,210,214,216,232,236,242,243,
 250,256,272]