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A004650 as a simple table

na(n)
10
20
31
42
55
66
71
81
93
107
117
1211
1313
1413
1515
162
175
184
197
208
217
2210
2311
2414
2519
2620
2719
2820
2919
3020
3131
3232
331
3434
355
363
375
387
397
409
4111
429
4315
4413
4513
4611
4719
4827
4927
5025
5125
5227
5325
5431
5533
5635
5737
5835
5937
6037
6135
6241
6351
6451
6549
6649
6759
6861
6967
7065
7165
7267

[0,0,1,2,5,6,1,1,3,7,7,11,13,13,15,2,5,4,7,8,7,10,
 11,14,19,20,19,20,19,20,31,32,1,34,5,3,5,7,7,9,11,
 9,15,13,13,11,19,27,27,25,25,27,25,31,33,35,37,35,
 37,37,35,41,51,51,49,49,59,61,67,65,65,67]