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A263449 as a simple table

na(n)
01
14
23
32
45
58
67
76
89
912
1011
1110
1213
1316
1415
1514
1617
1720
1819
1918
2021
2124
2223
2322
2425
2528
2627
2726
2829
2932
3031
3130
3233
3336
3435
3534
3637
3740
3839
3938
4041
4144
4243
4342
4445
4548
4647
4746
4849
4952
5051
5150
5253
5356
5455
5554
5657
5760
5859
5958
6061
6164
6263
6362
6465
6568
6667

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