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A056018 as a simple table

na(n)
00
11
22
33
44
55
67
76
88
910
1011
119
1212
1313
1415
1516
1618
1720
1814
1917
2019
2121
2223
2324
2426
2528
2629
2731
2832
2922
3025
3127
3230
3333
3434
3536
3637
3739
3841
3942
4044
4145
4247
4349
4450
4552
4654
4735
4838
4940
5043
5146
5248
5351
5453
5555
5657
5758
5860
5962
6063
6165
6266
6368
6470
6571
6673
6775
6876
6978
7079
7181

[0,1,2,3,4,5,7,6,8,10,11,9,12,13,15,16,18,20,14,
 17,19,21,23,24,26,28,29,31,32,22,25,27,30,33,34,
 36,37,39,41,42,44,45,47,49,50,52,54,35,38,40,43,
 46,48,51,53,55,57,58,60,62,63,65,66,68,70,71,73,
 75,76,78,79,81]