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A300840 as a simple table

na(n)
11
21
32
43
54
62
75
83
97
104
119
126
1311
145
158
1613
1716
187
1917
2012
2110
229
2319
246
2523
2611
2714
2815
2925
308
3129
3213
3318
3416
3520
3621
3731
3817
3922
4012
4137
4210
4341
4427
4528
4619
4743
4826
4947
5023
5132
5233
5349
5414
5536
5615
5734
5825
5953
6024
6159
6229
6335
6439
6544
6618
6761
6848
6938
7020
7167
7221
7371
7431
7546
7651
7745
7822
7973
8052
8179
8237
8381
8430
8564
8641
8750
8827

[1,1,2,3,4,2,5,3,7,4,9,6,11,5,8,13,16,7,17,12,10,
 9,19,6,23,11,14,15,25,8,29,13,18,16,20,21,31,17,
 22,12,37,10,41,27,28,19,43,26,47,23,32,33,49,14,
 36,15,34,25,53,24,59,29,35,39,44,18,61,48,38,20,
 67,21,71,31,46,51,45,22,73,52,79,37,81,30,64,41,
 50,27]