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A222240 as a simple table

na(n)
00
11
22
33
45
54
66
77
88
99
1010
1111
1212
1313
1415
1514
1616
1717
1818
1919
2020
2121
2222
2323
2425
2524
2626
2727
2828
2929
3030
3131
3232
3333
3435
3534
3636
3737
3838
3939
4050
4151
4252
4353
4455
4554
4656
4757
4858
4959
5040
5141
5242
5343
5445
5544
5646
5747
5848
5949
6060
6161
6262
6363
6465
6564
6666
6767
6868
6969
7070
7171
7272
7373
7475
7574

[0,1,2,3,5,4,6,7,8,9,10,11,12,13,15,14,16,17,18,
 19,20,21,22,23,25,24,26,27,28,29,30,31,32,33,35,
 34,36,37,38,39,50,51,52,53,55,54,56,57,58,59,40,
 41,42,43,45,44,46,47,48,49,60,61,62,63,65,64,66,
 67,68,69,70,71,72,73,75,74]