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A307613 as a simple table

na(n)
00
11
22
34
43
55
68
76
89
97
1010
1116
1211
1317
1412
1518
1613
1719
1814
1920
2015
2121
2232
2322
2433
2523
2634
2724
2835
2925
3036
3126
3237
3327
3438
3528
3639
3729
3840
3930
4041
4131
4242
4364
4443
4565
4644
4766
4845
4967
5046
5168
5247
5369
5448
5570
5649
5771
5850
5972
6051
6173
6252
6374
6453
6575
6654
6776
6855
6977

[0,1,2,4,3,5,8,6,9,7,10,16,11,17,12,18,13,19,14,
 20,15,21,32,22,33,23,34,24,35,25,36,26,37,27,38,
 28,39,29,40,30,41,31,42,64,43,65,44,66,45,67,46,
 68,47,69,48,70,49,71,50,72,51,73,52,74,53,75,54,
 76,55,77]