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A118319 as a simple table

na(n)
11
23
32
47
54
66
75
815
98
1010
119
1214
1311
1413
1512
1631
1716
1818
1917
2022
2119
2221
2320
2430
2523
2625
2724
2829
2926
3028
3127
3263
3332
3434
3533
3638
3735
3837
3936
4046
4139
4241
4340
4445
4542
4644
4743
4862
4947
5049
5148
5253
5350
5452
5551
5661
5754
5856
5955
6060
6157
6259
6358
64127
6564
6666
6765
6870
6967
7069
7168
7278

[1,3,2,7,4,6,5,15,8,10,9,14,11,13,12,31,16,18,17,
 22,19,21,20,30,23,25,24,29,26,28,27,63,32,34,33,
 38,35,37,36,46,39,41,40,45,42,44,43,62,47,49,48,
 53,50,52,51,61,54,56,55,60,57,59,58,127,64,66,65,
 70,67,69,68,78]