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A338166 as a simple table

na(n)
11818
28181
3181818
4198198
5405405
6484848
7504504
8565656
9576576
10656565
11675675
12818181
13848484
14891891
1511311131
1613041304
1713111311
1818181818
1919981998
2022622262
2126222622
2233933393
2339333933
2440314031
2541544154
2645144514
2746364636
2863646364
2981818181
3087498749
3189918991
3294789478

[1818,8181,181818,198198,405405,484848,504504,
 565656,576576,656565,675675,818181,848484,891891,
 11311131,13041304,13111311,18181818,19981998,
 22622262,26222622,33933393,39333933,40314031,
 41544154,45144514,46364636,63646364,81818181,
 87498749,89918991,94789478]