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A305495 as a simple table

na(n)
13
26
39
412
515
618
721
823
924
1027
1130
1233
1336
1439
1542
1645
1748
1850
1951
2054
2157
2260
2363
2466
2569
2672
2775
2877
2978
3081
3184
3287
3390
3493
3596
3699
37102
38104
39105
40108
41111
42114
43117
44120
45123
46126
47129
48131
49132
50135
51138
52141
53144
54147
55150
56153
57156
58158
59159

[3,6,9,12,15,18,21,23,24,27,30,33,36,39,42,45,48,
 50,51,54,57,60,63,66,69,72,75,77,78,81,84,87,90,
 93,96,99,102,104,105,108,111,114,117,120,123,126,
 129,131,132,135,138,141,144,147,150,153,156,158,
 159]