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A246647 as a simple table

na(n)
12
23
36
47
59
612
715
816
918
1019
1121
1224
1325
1427
1528
1630
1733
1834
1936
2037
2139
2242
2343
2445
2548
2651
2752
2854
2955
3057
3160
3263
3364
3466
3569
3670
3772
3873
3975
4078
4179
4281
4382
4484
4587
4688
4790
4893
4996
5097
5199
52100
53102
54105
55106
56108
57109
58111
59114
60115

[2,3,6,7,9,12,15,16,18,19,21,24,25,27,28,30,33,34,
 36,37,39,42,43,45,48,51,52,54,55,57,60,63,64,66,
 69,70,72,73,75,78,79,81,82,84,87,88,90,93,96,97,
 99,100,102,105,106,108,109,111,114,115]