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A210520 as a simple table

na(n)
00
10
21
32
44
56
611
717
828
942
1064
11105
12173
13267
14438
15726
161200
172015
183325
195524
209289
2115659
2226494
2344946
2476483
25129930
26221530
27377856
28645685
291105802
301895983
313254036
325593440
339625882
3416578830
3528590987
3649347768
3785253634

[0,0,1,2,4,6,11,17,28,42,64,105,173,267,438,726,
 1200,2015,3325,5524,9289,15659,26494,44946,76483,
 129930,221530,377856,645685,1105802,1895983,
 3254036,5593440,9625882,16578830,28590987,
 49347768,85253634]