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A139636 as a simple table

na(n)
23
35
46
57
68
711
89
910
1012
1113
1214
1317
1415
1516
1618
1719
1820
1923
2021
2122
2224
2329
2425
2526
2627
2728
2830
2931
3032
3137
3233
3334
3435
3536
3638
3741
3839
3940
4042
4143
4244
4347
4445
4546
4648
4753
4849
4950
5051
5152
5254
5359
5455
5556
5657
5758
5860
5961
6062
6167
6263
6364
6465
6566
6668
6771
6869
6970
7072
7173
7274

[3,5,6,7,8,11,9,10,12,13,14,17,15,16,18,19,20,23,
 21,22,24,29,25,26,27,28,30,31,32,37,33,34,35,36,
 38,41,39,40,42,43,44,47,45,46,48,53,49,50,51,52,
 54,59,55,56,57,58,60,61,62,67,63,64,65,66,68,71,
 69,70,72,73,74]