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A242733 as a simple table

na(n)
15
26
39
412
515
620
77
89
911
109
1111
125
137
148
1510
1612
1710
1815
1920
2025
2130
2215
2320
2425
2530
268
2712
2816
2916
3020
3120
3225
3325
3430
3518
3618
3724
3830
3930
4035
4135
4240
4340
4418
4524
4630
4735
4840
497
508
519
5211
5312
5413
5514
5614
5715
5821
5922
6022
6123
6210
639
6410
6515
6628
6732
6865
6970
7070

[5,6,9,12,15,20,7,9,11,9,11,5,7,8,10,12,10,15,20,
 25,30,15,20,25,30,8,12,16,16,20,20,25,25,30,18,18,
 24,30,30,35,35,40,40,18,24,30,35,40,7,8,9,11,12,
 13,14,14,15,21,22,22,23,10,9,10,15,28,32,65,70,70]