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A263694 as a simple table

na(n)
01
12
23
34
48
57
66
75
89
910
1011
1112
1216
1315
1414
1513
1617
1718
1819
1920
2024
2123
2222
2321
2425
2526
2627
2728
2832
2931
3030
3129
3233
3334
3435
3536
3640
3739
3838
3937
4041
4142
4243
4344
4448
4547
4646
4745
4849
4950
5051
5152
5256
5355
5454
5553
5657
5758
5859
5960
6064
6163
6262
6361
6465
6566
6667
6768
6872
6971
7070
7169
7273
7374
7475

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