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A298747 as a simple table

na(n)
21
32
43
54
65
76
88
99
1010
1111
1212
1313
1414
1515
1616
1717
1818
1919
2020
2121
2222
2323
2424
2525
2626
2727
2828
2929
3030
3131
3264
3365
3466
3567
3668
3769
3870
3971
4072
4173
4274
4375
4476
4577
4678
4779
4880
4981
5082
5183
5284
5385
5486
5587
5688
5789
5890
5991
6092
6193
6294
6395
6496
6597
6698
6799
68100
69101
70102
71103
72104
73105
74106
75107
76108

[1,2,3,4,5,6,8,9,10,11,12,13,14,15,16,17,18,19,20,
 21,22,23,24,25,26,27,28,29,30,31,64,65,66,67,68,
 69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,
 85,86,87,88,89,90,91,92,93,94,95,96,97,98,99,100,
 101,102,103,104,105,106,107,108]