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A064427 as a simple table

na(n)
11
22
34
46
57
69
710
812
913
1014
1115
1217
1318
1420
1521
1622
1723
1825
1926
2028
2129
2230
2331
2433
2534
2635
2736
2837
2938
3040
3141
3243
3344
3445
3546
3647
3748
3850
3951
4052
4153
4255
4356
4458
4559
4660
4761
4863
4964
5065
5166
5267
5368
5470
5571
5672
5773
5874
5975
6077
6178
6280
6381
6482

[1,2,4,6,7,9,10,12,13,14,15,17,18,20,21,22,23,25,
 26,28,29,30,31,33,34,35,36,37,38,40,41,43,44,45,
 46,47,48,50,51,52,53,55,56,58,59,60,61,63,64,65,
 66,67,68,70,71,72,73,74,75,77,78,80,81,82]