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A113966 as a simple table

na(n)
11
23
35
42
56
610
74
87
99
1011
118
1213
1315
1417
1512
1619
1714
1818
1922
2016
2121
2223
2320
2426
2529
2624
2731
2825
2927
3032
3135
3233
3328
3434
3530
3637
3739
3841
3936
4043
4138
4242
4346
4440
4547
4644
4749
4845
4951
5053
5148
5255
5352
5457
5550
5654
5758
5861
5956
6059
6162
6265
6363
6467
6560
6668
6771
6864
6969
7073
7166
7270

[1,3,5,2,6,10,4,7,9,11,8,13,15,17,12,19,14,18,22,
 16,21,23,20,26,29,24,31,25,27,32,35,33,28,34,30,
 37,39,41,36,43,38,42,46,40,47,44,49,45,51,53,48,
 55,52,57,50,54,58,61,56,59,62,65,63,67,60,68,71,
 64,69,73,66,70]