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A338048 as a simple table

na(n)
12
22
34
45
511
66
77
89
913
1012
1111
1212
1319
1416
1519
1617
1717
1818
1920
2021
2123
2230
2324
2426
2532
2634
2727
2830
2929
3036
3137
3236
3335
3436
3535
3641
3737
3840
3943
4041
4143
4242
4343
4445
4547
4650
4748
4848
4951
5052
5151
5257
5353
5454
5555
5657
5759
5860
5961
6060
6163
6276
6364
6465
6565
6666
6775

[2,2,4,5,11,6,7,9,13,12,11,12,19,16,19,17,17,18,
 20,21,23,30,24,26,32,34,27,30,29,36,37,36,35,36,
 35,41,37,40,43,41,43,42,43,45,47,50,48,48,51,52,
 51,57,53,54,55,57,59,60,61,60,63,76,64,65,65,66,
 75]