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A087913 as a simple table

na(n)
10
21
31
43
51
65
71
86
97
107
111
1210
131
1413
1513
1612
171
1815
191
2015
2119
2219
231
2420
2523
2623
2726
2826
291
3026
311
3224
3331
3431
3531
3630
371
3837
3937
4030
411
4239
431
4439
4539
4643
471
4840
4947
5049
5147
5251
531
5452
5553
5652
5753
5853
591
6052
611
6261
6362
6448
6561
6665
671
6865
6967
7069
711
7260
731
7473
7574
7674
7773

[0,1,1,3,1,5,1,6,7,7,1,10,1,13,13,12,1,15,1,15,19,
 19,1,20,23,23,26,26,1,26,1,24,31,31,31,30,1,37,37,
 30,1,39,1,39,39,43,1,40,47,49,47,51,1,52,53,52,53,
 53,1,52,1,61,62,48,61,65,1,65,67,69,1,60,1,73,74,
 74,73]