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A115307 as a simple table

na(n)
11
22
33
44
55
66
713
812
911
1010
119
128
137
1420
1519
1618
1717
1816
1915
2014
2127
2226
2325
2424
2523
2622
2721
2834
2933
3032
3131
3230
3329
3428
3541
3640
3739
3838
3937
4036
4135
4248
4347
4446
4545
4644
4743
4842
4997
5096
5195
5294
5393
5492
5591
5690
5789
5888
5987
6086
6185
6284
6383
6482
6581
6680
6779
6878
6977
7076
7175
7274

[1,2,3,4,5,6,13,12,11,10,9,8,7,20,19,18,17,16,15,
 14,27,26,25,24,23,22,21,34,33,32,31,30,29,28,41,
 40,39,38,37,36,35,48,47,46,45,44,43,42,97,96,95,
 94,93,92,91,90,89,88,87,86,85,84,83,82,81,80,79,
 78,77,76,75,74]