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A047214 as a simple table

na(n)
10
21
31
41
54
64
71
81
91
109
119
129
1312
148
1510
169
1716
1810
1911
2016
2115
2220
2318
2416
2524
2625
2719
2821
2928
3025
3116
3225
3331
3433
3529
3628
3736
3830
3927
4025
4140
4236
4341
4437
4536
4641
4742
4833
4943
5049
5149
5240
5352
5446
5549
5649
5749
5857
5957
6049
6160
6247
6336
6457
6564
6664
6764
6864
6964
7064
7164
7264
7372
7473

[0,1,1,1,4,4,1,1,1,9,9,9,12,8,10,9,16,10,11,16,15,
 20,18,16,24,25,19,21,28,25,16,25,31,33,29,28,36,
 30,27,25,40,36,41,37,36,41,42,33,43,49,49,40,52,
 46,49,49,49,57,57,49,60,47,36,57,64,64,64,64,64,
 64,64,64,72,73]