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A180320 as a simple table

na(n)
00
11
21
3691
447
541
6691
759
847
9638653
102011
1153
1214477
1383
1459
1522298681
1647
171
1848540859
191
2047717
211058237
225407
2377
241450679
254471
2683
2771532367
28226439
2989
30971032651
311
3247
331310531
34167
35117419
36965295473
37179
381
39522242099
4047717
41113

[0,1,1,691,47,41,691,59,47,638653,2011,53,14477,
 83,59,22298681,47,1,48540859,1,47717,1058237,5407,
 77,1450679,4471,83,71532367,226439,89,971032651,1,
 47,1310531,167,117419,965295473,179,1,522242099,
 47717,113]