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A088402 as a simple table

na(n)
12
24
36
48
51
63
75
87
99
1011
1113
1215
1317
1419
1539
1659
1779
1899
19119
20139
21159
22179
23199
24399

[2,4,6,8,1,3,5,7,9,11,13,15,17,19,39,59,79,99,119,
 139,159,179,199,399]