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A121574 as a simple table

na(n)
01
12
21
34
45
51
68
716
88
91
1016
1144
1237
1311
141
1532
16112
17134
1867
1914
201
2164
22272
23424
24305
25106
2617
271
28128
29640
301232
311168
32584
33154
3420
351
36256
371472
383376
393992
402641
41998
42211
4323
441
45512
463328
478864
4812592
4910442
505221
511574
52277
5326
541

[1,2,1,4,5,1,8,16,8,1,16,44,37,11,1,32,112,134,67,
 14,1,64,272,424,305,106,17,1,128,640,1232,1168,
 584,154,20,1,256,1472,3376,3992,2641,998,211,23,1,
 512,3328,8864,12592,10442,5221,1574,277,26,1]