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A268781 as a simple table

na(n)
12
24
34
47
511
67
713
826
926
1013
1123
1265
1391
1465
1523
1641
17148
18316
19316
20148
2141
2272
23343
241031
251462
261031
27343
2872
29126
30766
313354
326383
336383
343354
35766
36126
37219
381709
3910615
4027531
4138483
4227531
4310615
441709
45219
46379
473752
4833344
49115391
50224960

[2,4,4,7,11,7,13,26,26,13,23,65,91,65,23,41,148,
 316,316,148,41,72,343,1031,1462,1031,343,72,126,
 766,3354,6383,6383,3354,766,126,219,1709,10615,
 27531,38483,27531,10615,1709,219,379,3752,33344,
 115391,224960]