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A072987 as a simple table

na(n)
11
21
31
42
53
65
78
86
97
1013
1110
1213
1311
1412
1523
1620
1712
1816
1928
2025
2114
2219
2333
2429
2515
2620
2735
2828
298
308
3116
3224
3340
3431
3538
3634
3737
3834
3934
4068
4162
4249
4328
4435
4563
4653
4725
4832
4957
5040
5148
5288
5384
5467
5544
5657
5745
5846
5991
6078
6150
6268
6356
6462
65118
66115
67102

[1,1,1,2,3,5,8,6,7,13,10,13,11,12,23,20,12,16,28,
 25,14,19,33,29,15,20,35,28,8,8,16,24,40,31,38,34,
 37,34,34,68,62,49,28,35,63,53,25,32,57,40,48,88,
 84,67,44,57,45,46,91,78,50,68,56,62,118,115,102]