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A064108 as a simple table

na(n)
00
11
221
3421
48421
5168421
63368421
767368421
81347368421
926947368421
10538947368421
1110778947368421
12215578947368421
134311578947368421
1486231578947368421
151724631578947368421
1634492631578947368421
17689852631578947368421
1813797052631578947368421
19275941052631578947368421

[0,1,21,421,8421,168421,3368421,67368421,
 1347368421,26947368421,538947368421,
 10778947368421,215578947368421,4311578947368421,
 86231578947368421,1724631578947368421,
 34492631578947368421,689852631578947368421,
 13797052631578947368421,275941052631578947368421]