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A225852 as a simple table

na(n)
13
24
35
46
57
67
78
89
99
1010
1110
1211
1311
1412
1512
1613
1713
1814
1914
2014
2115
2215
2316
2416
2516
2617
2717
2818
2918
3018
3119
3219
3319
3420
3520
3620
3721
3821
3921
4022
4122
4222
4323
4423
4523
4624
4724
4824
4925
5025
5125
5226
5326
5426
5526
5627
5727
5827
5928
6028
6128
6229
6329
6429
6529
6630
6730

[3,4,5,6,7,7,8,9,9,10,10,11,11,12,12,13,13,14,14,
 14,15,15,16,16,16,17,17,18,18,18,19,19,19,20,20,
 20,21,21,21,22,22,22,23,23,23,24,24,24,25,25,25,
 26,26,26,26,27,27,27,28,28,28,29,29,29,29,30,30]