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A309941 as a simple table

na(n)
21
32
43
54
64
74
87
98
106
114
128
136
145
157
167
177
1810
194
2011
2110
228
236
2413
2513
2611
279
2813
2910
3015
314
3213
3312
3413
3510
3618
3711
388
3910
4016
419
4216
436
4415
4518
469
475
4819
4920
5014
5115
5217
538
5416
5512
5618
5710
5810
595
6026
618
6210
6314
6420
6519
6617
679
6817
6912
7019
717
7229
7315
748
7511
7620
7713
7821
798

[1,2,3,4,4,4,7,8,6,4,8,6,5,7,7,7,10,4,11,10,8,6,
 13,13,11,9,13,10,15,4,13,12,13,10,18,11,8,10,16,9,
 16,6,15,18,9,5,19,20,14,15,17,8,16,12,18,10,10,5,
 26,8,10,14,20,19,17,9,17,12,19,7,29,15,8,11,20,13,
 21,8]