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A287270 as a simple table

na(n)
18
210
318
420
522
624
728
830
940
1042
1150
1252
1354
1456
1560
1662
1766
1868
1972
2074
2184
2286
2390
2492
25108
26110
27118
28120
29122
30124
31128
32130
33140
34142
35150
36152
37154
38156
39160
40162
41166
42168
43172
44174
45184
46186
47190
48192
49202
50204
51208
52210
53220
54222
55226
56228
57244

[8,10,18,20,22,24,28,30,40,42,50,52,54,56,60,62,
 66,68,72,74,84,86,90,92,108,110,118,120,122,124,
 128,130,140,142,150,152,154,156,160,162,166,168,
 172,174,184,186,190,192,202,204,208,210,220,222,
 226,228,244]