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A260933 as a simple table

na(n)
17
26
35
44
53
62
71
812
911
1010
119
128
1313
1418
1517
1616
1715
1814
1919
2024
2123
2222
2321
2420
2525
2628
2727
2826
2933
3032
3131
3230
3329
3434
3539
3638
3737
3836
3935
4040
4143
4242
4341
4446
4545
4644
4747
4850
4949
5048
5153
5252
5351
5456
5555
5654
5757
5858
5959
6060
6161
6262
6365
6464
6563
6666
6767

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