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A375755 as a simple table

na(n)
11
22
33
44
55
66
77
88
99
1010
1120
1211
1321
1412
1522
1613
1723
1814
1924
2015
2125
2216
2326
2417
2527
2618
2728
2819
2929
3030
3140
3231
3341
3432
3542
3633
3743
3834
3944
4035
4145
4236
4346
4437
4547
4638
4748
4839
4949
5050
5160
5251
5361
5452
5562
5653
5763
5854
5964
6055
6165
6256
6366
6457
6567
6658
6768

[1,2,3,4,5,6,7,8,9,10,20,11,21,12,22,13,23,14,24,
 15,25,16,26,17,27,18,28,19,29,30,40,31,41,32,42,
 33,43,34,44,35,45,36,46,37,47,38,48,39,49,50,60,
 51,61,52,62,53,63,54,64,55,65,56,66,57,67,58,68]