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A248229 as a simple table

na(n)
12
23
35
46
57
69
710
812
913
1015
1116
1218
1319
1420
1522
1623
1725
1826
1928
2029
2131
2232
2333
2435
2536
2638
2739
2841
2942
3043
3145
3246
3348
3449
3551
3652
3754
3855
3956
4058
4159
4261
4362
4464
4565
4667
4768
4869
4971
5072
5174
5275
5377
5478
5580
5681
5782
5884
5985
6087
6188
6290
6391
6493
6594
6695

[2,3,5,6,7,9,10,12,13,15,16,18,19,20,22,23,25,26,
 28,29,31,32,33,35,36,38,39,41,42,43,45,46,48,49,
 51,52,54,55,56,58,59,61,62,64,65,67,68,69,71,72,
 74,75,77,78,80,81,82,84,85,87,88,90,91,93,94,95]