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A307113 as a simple table

na(n)
01
12
23
35
46
58
610
712
813
915
1014
1115
1217
1316
1416
1519
1617
1721
1819
1920
2026
2122
2225
2326
2425
2529
2628
2726
2827
2928
3029
3133
3233
3334
3437
3537
3635
3735
3839
3937
4038
4138
4237
4337
4438
4538
4641
4738
4837
4936
5037
5137
5240
5344
5444
5545
5644
5744
5845
5945
6049
6148
6252
6351
6453
6552
6651

[1,2,3,5,6,8,10,12,13,15,14,15,17,16,16,19,17,21,
 19,20,26,22,25,26,25,29,28,26,27,28,29,33,33,34,
 37,37,35,35,39,37,38,38,37,37,38,38,41,38,37,36,
 37,37,40,44,44,45,44,44,45,45,49,48,52,51,53,52,
 51]