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A047387 as a simple table

na(n)
11
22
35
48
59
612
715
816
919
1022
1123
1226
1329
1430
1533
1636
1737
1840
1943
2044
2147
2250
2351
2454
2557
2658
2761
2864
2965
3068
3171
3272
3375
3478
3579
3682
3785
3886
3989
4092
4193
4296
4399
44100
45103
46106
47107
48110
49113
50114
51117
52120
53121
54124
55127
56128
57131
58134
59135
60138
61141

[1,2,5,8,9,12,15,16,19,22,23,26,29,30,33,36,37,40,
 43,44,47,50,51,54,57,58,61,64,65,68,71,72,75,78,
 79,82,85,86,89,92,93,96,99,100,103,106,107,110,
 113,114,117,120,121,124,127,128,131,134,135,138,
 141]