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A249721 as a simple table

na(n)
00
12
24
36
48
512
614
718
820
922
1024
1126
1236
1338
1442
1544
1654
1756
1858
1960
2062
2166
2268
2372
2474
2576
2678
2780
28108
29110
30114
31116
32126
33128
34132
35134
36162
37164
38166
39168
40170
41174
42176
43180
44182
45184
46186
47188
48198
49200
50204
51206
52216
53218
54220
55222
56224
57228
58230
59234
60236
61238
62240
63242
64324

[0,2,4,6,8,12,14,18,20,22,24,26,36,38,42,44,54,56,
 58,60,62,66,68,72,74,76,78,80,108,110,114,116,126,
 128,132,134,162,164,166,168,170,174,176,180,182,
 184,186,188,198,200,204,206,216,218,220,222,224,
 228,230,234,236,238,240,242,324]