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A138095 as a simple table

na(n)
11
23
33
44
56
67
77
810
910
1010
1112
1214
1314
1415
1515
1617
1718
1819
1920
2023
2122
2222
2325
2424
2525
2627
2729
2830
2932
3032
3131
3232
3334
3435
3539
3636
3738
3839
3941
4042
4143
4243
4345
4446
4546
4646
4748
4852
4951
5053
5151
5252
5355
5455
5556
5659
5757
5860
5963
6062
6162
6264
6363
6465
6566
6668
6769
6870
6972
7071

[1,3,3,4,6,7,7,10,10,10,12,14,14,15,15,17,18,19,
 20,23,22,22,25,24,25,27,29,30,32,32,31,32,34,35,
 39,36,38,39,41,42,43,43,45,46,46,46,48,52,51,53,
 51,52,55,55,56,59,57,60,63,62,62,64,63,65,66,68,
 69,70,72,71]