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A115102 as a simple table

na(n)
02
18
212
328
452
5108
6212
7428
8852
91708
103412
116828
1213652
1327308
1454612
15109228
16218452
17436908
18873812
191747628
203495252
216990508
2213981012
2327962028
2455924052
25111848108
26223696212
27447392428
28894784852
291789569708
303579139412
317158278828

[2,8,12,28,52,108,212,428,852,1708,3412,6828,
 13652,27308,54612,109228,218452,436908,873812,
 1747628,3495252,6990508,13981012,27962028,
 55924052,111848108,223696212,447392428,894784852,
 1789569708,3579139412,7158278828]