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A040460 as a simple table

na(n)
021
11
220
31
442
51
620
71
842
91
1020
111
1242
131
1420
151
1642
171
1820
191
2042
211
2220
231
2442
251
2620
271
2842
291
3020
311
3242
331
3420
351
3642
371
3820
391
4042
411
4220
431
4442
451
4620
471
4842
491
5020
511
5242
531
5420
551
5642
571
5820
591
6042
611
6220
631
6442
651
6620
671
6842
691
7020
711
7242
731
7420

[21,1,20,1,42,1,20,1,42,1,20,1,42,1,20,1,42,1,20,
 1,42,1,20,1,42,1,20,1,42,1,20,1,42,1,20,1,42,1,20,
 1,42,1,20,1,42,1,20,1,42,1,20,1,42,1,20,1,42,1,20,
 1,42,1,20,1,42,1,20,1,42,1,20,1,42,1,20]