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A005050 as a simple table

na(n)
66
77
88
99
1011
1112
1213
1314
1416
1517
1618
1719
1821
1922
2023
2124
2225
2328
2431
2532
2634
2735
2836
2938
3039
3140
3243
3344
3445
3547
3648
3749
3850
3953
4055
4157
4258
4360
4461
4563
4664
4765
4867
4969
5070
5172
5273
5374
5475
5579
5681
5782
5884
5985
6087
6188
6290
6392
6493
6594
6695
6797
6898
6999
70100
71104

[6,7,8,9,11,12,13,14,16,17,18,19,21,22,23,24,25,
 28,31,32,34,35,36,38,39,40,43,44,45,47,48,49,50,
 53,55,57,58,60,61,63,64,65,67,69,70,72,73,74,75,
 79,81,82,84,85,87,88,90,92,93,94,95,97,98,99,100,
 104]