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A121946 as a simple table

na(n)
01
12
23
35
48
512
618
726
837
951
1069
1192
12121
13157
14202
15257
16324
17405
18503
19620
20760
21926
221122
231353
241624
251941
262310
272739
283235
293808
304468
315226
326095
337088
348221
359511
3610976
3712638
3814519
3916644
4019041

[1,2,3,5,8,12,18,26,37,51,69,92,121,157,202,257,
 324,405,503,620,760,926,1122,1353,1624,1941,2310,
 2739,3235,3808,4468,5226,6095,7088,8221,9511,
 10976,12638,14519,16644,19041]