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A260402 as a simple table

na(n)
12
23
34
45
57
68
79
810
911
1013
1114
1216
1317
1419
1521
1622
1723
1825
1926
2027
2129
2231
2332
2434
2537
2638
2739
2841
2943
3044
3146
3247
3349
3450
3551
3653
3757
3858
3959
4061
4162
4264
4367
4468
4569
4671
4773
4874
4979
5081
5182
5283
5386
5487
5589
5692
5793
5894
5997
6098
61101
62103
63106
64107
65109

[2,3,4,5,7,8,9,10,11,13,14,16,17,19,21,22,23,25,
 26,27,29,31,32,34,37,38,39,41,43,44,46,47,49,50,
 51,53,57,58,59,61,62,64,67,68,69,71,73,74,79,81,
 82,83,86,87,89,92,93,94,97,98,101,103,106,107,109]