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A123497 as a simple table

na(n)
00
11
22
33
44
56
67
75
88
99
1010
1114
1216
1319
1417
1518
1612
1711
1813
1920
2015
2121
2222
2323
2424
2525
2626
2727
2837
2938
3042
3144
3247
3351
3453
3556
3660
3745
3846
3948
4049
4150
4231
4332
4430
4528
4629
4734
4833
4935
5036
5154
5255
5340
5439
5541
5657
5743
5858
5959
6061
6152
6262
6363
6464
6565
6666
6767
6868
6969
7070
7171

[0,1,2,3,4,6,7,5,8,9,10,14,16,19,17,18,12,11,13,
 20,15,21,22,23,24,25,26,27,37,38,42,44,47,51,53,
 56,60,45,46,48,49,50,31,32,30,28,29,34,33,35,36,
 54,55,40,39,41,57,43,58,59,61,52,62,63,64,65,66,
 67,68,69,70,71]