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A104401 as a simple table

na(n)
00
11
22
34
45
56
68
79
810
912
1013
1114
1216
1317
1418
1520
1621
1722
1824
1925
2026
2128
2229
2330
2432
2533
2634
2736
2837
2938
3040
3141
3242
3344
3445
3546
3648
3749
3850
3952
4053
4154
4256
4357
4458
4560
4661
4764
4865
4966
5068
5169
5270
5372
5473
5574
5676
5777
5878

[0,1,2,4,5,6,8,9,10,12,13,14,16,17,18,20,21,22,24,
 25,26,28,29,30,32,33,34,36,37,38,40,41,42,44,45,
 46,48,49,50,52,53,54,56,57,58,60,61,64,65,66,68,
 69,70,72,73,74,76,77,78]