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A048964 as a simple table

na(n)
12
23
35
46
57
68
710
811
912
1014
1115
1216
1317
1419
1520
1621
1723
1824
1925
2027
2128
2229
2331
2432
2533
2634
2736
2837
2938
3040
3141
3242
3344
3445
3546
3647
3749
3850
3951
4053
4154
4255
4357
4458
4559
4660
4762
4863
4964
5066
5167
5268
5370
5471
5572
5673
5775
5876
5977
6079
6180
6281
6383
6484
6585
6686
6788
6889
6990
7092
7193

[2,3,5,6,7,8,10,11,12,14,15,16,17,19,20,21,23,24,
 25,27,28,29,31,32,33,34,36,37,38,40,41,42,44,45,
 46,47,49,50,51,53,54,55,57,58,59,60,62,63,64,66,
 67,68,70,71,72,73,75,76,77,79,80,81,83,84,85,86,
 88,89,90,92,93]