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A089623 as a simple table

na(n)
11
22
34
46
58
612
714
818
920
1026
1128
1232
1334
1436
1542
1646
1748
1854
1960
2062
2168
2270
2374
2476
2588
2692
27102
28106
29116
30118
31120
32126
33130
34134
35138
36144
37154
38160
39168
40172
41176
42182
43190
44204
45210
46216
47222
48230
49232
50236
51238
52246
53252
54256
55258
56264
57266
58272

[1,2,4,6,8,12,14,18,20,26,28,32,34,36,42,46,48,54,
 60,62,68,70,74,76,88,92,102,106,116,118,120,126,
 130,134,138,144,154,160,168,172,176,182,190,204,
 210,216,222,230,232,236,238,246,252,256,258,264,
 266,272]