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A274529 as a simple table

na(n)
11
23
34
46
56
68
710
811
913
1014
1116
1218
1318
1420
1520
1622
1722
1824
1926
2026
2127
2229
2330
2432
2535
2635
2738
2840
2940
3041
3143
3243
3343
3443
3547
3647
3747
3852
3953
4053
4154
4256
4358
4458
4560
4660
4760
4862
4964
5064
5167
5267
5368
5473
5574
5674
5774
5874
5977
6078
6178
6279
6380
6487
6587
6687
6787

[1,3,4,6,6,8,10,11,13,14,16,18,18,20,20,22,22,24,
 26,26,27,29,30,32,35,35,38,40,40,41,43,43,43,43,
 47,47,47,52,53,53,54,56,58,58,60,60,60,62,64,64,
 67,67,68,73,74,74,74,74,77,78,78,79,80,87,87,87,
 87]