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A289749 as a simple table

na(n)
01
11
22
33
43
55
65
75
88
98
108
115
1210
1313
1412
1512
1613
1710
187
1915
2018
2121
2216
2320
2420
2516
2621
2718
2815
297
3017
3125
3227
3327
3434
3529
3620
3732
3832
3932
4020
4129
4234
4327
4427
4525
4617
479
4824
4932
5040
5133
5245
5345
5439
5555
5650
5745
5824
5940
6052
6148
6248
6352
6440
6524
6645
6750
6855
6939
7045
7145

[1,1,2,3,3,5,5,5,8,8,8,5,10,13,12,12,13,10,7,15,
 18,21,16,20,20,16,21,18,15,7,17,25,27,27,34,29,20,
 32,32,32,20,29,34,27,27,25,17,9,24,32,40,33,45,45,
 39,55,50,45,24,40,52,48,48,52,40,24,45,50,55,39,
 45,45]