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A281121 as a simple table

na(n)
12
22
33
42
55
63
77
82
910
103
1111
1212
1313
1414
152
162
1717
184
1919
2021
2122
223
2323
2424
2525
262
273
2828
2929
3030
3131
3232
332
3417
3535
3636
3737
3838
3939
402
412
424
4341
4445
4543
4646
4747
4848
4949
5050
512
522
5353
543
5555
5656
572
5829
5959
6060
6161
6262
6363
6464
655
6666
6767
682
693
7070
7171
7272

[2,2,3,2,5,3,7,2,10,3,11,12,13,14,2,2,17,4,19,21,
 22,3,23,24,25,2,3,28,29,30,31,32,2,17,35,36,37,38,
 39,2,2,4,41,45,43,46,47,48,49,50,2,2,53,3,55,56,2,
 29,59,60,61,62,63,64,5,66,67,2,3,70,71,72]