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A131187 as a simple table

na(n)
10
20
30
41
51
62
73
83
94
106
115
126
139
148
158
1611
1711
1812
1913
2012
2115
2218
2315
2415
2520
2620
2719
2822
2921
3022
3125
3224
3327
3428
3524
3627
3733
3832
3929
4032
4133
4234
4337
4434
4537
4642
4737
4837
4942
5042
5143
5246
5345
5444
5545
5646
5751
5854
5947
6048
6157
6254
6352
6455
6555
6658
6761
6860
6959
7062
7159
7260
7369
7466

[0,0,0,1,1,2,3,3,4,6,5,6,9,8,8,11,11,12,13,12,15,
 18,15,15,20,20,19,22,21,22,25,24,27,28,24,27,33,
 32,29,32,33,34,37,34,37,42,37,37,42,42,43,46,45,
 44,45,46,51,54,47,48,57,54,52,55,55,58,61,60,59,
 62,59,60,69,66]