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A012662 as a simple table

na(n)
01
10
21
36
421
5100
6957
78498
870217
9762696
109950809
11128378910
121775380893
1328325140012
14483428842197
158558590549322
16163465935697169
173367220579004048
1872712394227734577
191648059951297530166

[1,0,1,6,21,100,957,8498,70217,762696,9950809,
 128378910,1775380893,28325140012,483428842197,
 8558590549322,163465935697169,3367220579004048,
 72712394227734577,1648059951297530166]