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A251736 as a simple table

na(n)
11
22
35
45
58
69
79
812
912
1015
1115
1215
1320
1424
1524
1624
1724
1829
1928
2028
2128
2232
2332
2432
2530
2637
2743
2840
2941
3043
3143
3243
3339

[1,2,5,5,8,9,9,12,12,15,15,15,20,24,24,24,24,29,
 28,28,28,32,32,32,30,37,43,40,41,43,43,43,39]