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A113636 as a simple table

na(n)
12
22
33
45
55
67
77
89
910
1011
1111
1213
1313
1415
1516
1617
1717
1819
1919
2021
2122
2223
2323
2425
2526
2627
2728
2829
2929
3031
3131
3233
3334
3435
3536
3637
3737
3839
3940
4041
4141
4243
4343
4445
4546
4647
4747
4849
4950
5051
5152
5253
5353
5455
5556
5657
5758
5859
5959
6061
6161
6263
6364
6465
6566
6667
6767
6869
6970
7071
7171
7273

[2,2,3,5,5,7,7,9,10,11,11,13,13,15,16,17,17,19,19,
 21,22,23,23,25,26,27,28,29,29,31,31,33,34,35,36,
 37,37,39,40,41,41,43,43,45,46,47,47,49,50,51,52,
 53,53,55,56,57,58,59,59,61,61,63,64,65,66,67,67,
 69,70,71,71,73]