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A297409 as a simple table

na(n)
11
22
33
45
56
64
77
810
911
1013
1114
1212
138
1415
159
1617
1719
1821
1918
2020
2123
2222
2328
2424
2516
2629
2726
2831
2930
3025
3133
3234
3335
3437
3538
3639
3741
3842
3936
4027
4143
4246
4344
4440
4547
4651
4745
4850
4952
5053
5155
5257
5358
5459
5561
5662
5760
5856
5948
6032
6164
6265
6366
6463
6549
6667
6769

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