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A129956 as a simple table

na(n)
15
29
34
45
56
64
75
88
94
107
1111
1213
1313
1418
1513
1617
1715
1815
1918
2020
2115
2221
2324
2425
2522
2618
2722
2819
2921
3025
3125
3227
3330
3429
3525
3628
3732
3834
3936
4035
4136
4240
4348
4447
4553
4655
4757
4857
4964
5063
5164
5265
5361
5453
5554
5652
5746
5845
5939
6041
6148
6254
6358
6456
6547
6647
6742
6848
6947
7041
7138
7236
7341

[5,9,4,5,6,4,5,8,4,7,11,13,13,18,13,17,15,15,18,
 20,15,21,24,25,22,18,22,19,21,25,25,27,30,29,25,
 28,32,34,36,35,36,40,48,47,53,55,57,57,64,63,64,
 65,61,53,54,52,46,45,39,41,48,54,58,56,47,47,42,
 48,47,41,38,36,41]