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A302931 as a simple table

na(n)
10
20
30
40
50
60
71
81
91
101
112
122
132
143
153
164
174
184
194
205
215
226
236
246
257
267
277
288
298
309
319
3210

[0,0,0,0,0,0,1,1,1,1,2,2,2,3,3,4,4,4,4,5,5,6,6,6,
 7,7,7,8,8,9,9,10]