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A123498 as a simple table

na(n)
00
11
22
33
44
57
65
76
88
99
1010
1117
1216
1318
1411
1520
1612
1714
1815
1913
2019
2121
2222
2323
2424
2525
2626
2727
2845
2946
3044
3142
3243
3348
3447
3549
3650
3728
3829
3954
4053
4155
4230
4357
4431
4537
4638
4732
4839
4940
5041
5133
5261
5334
5451
5552
5635
5756
5858
5959
6036
6160
6262
6363
6464
6565
6666
6767
6868
6969
7070
7171

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