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A154290 as a simple table

na(n)
10
20
30
40
51
62
73
85
95
107
116
128
136
148
158
1610
179
189
1911
2011
2110
2214
2310
2411
2511
2615
2713
2814
2910
3010
3111
3212
3312
3414
3515
3614
3713
3814
3912
4013
4111
4216
4313
4415
4515
4616
4713
4817
4912
5017

[0,0,0,0,1,2,3,5,5,7,6,8,6,8,8,10,9,9,11,11,10,14,
 10,11,11,15,13,14,10,10,11,12,12,14,15,14,13,14,
 12,13,11,16,13,15,15,16,13,17,12,17]