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A157218 as a simple table

na(n)
10
20
30
40
50
60
70
80
90
100
110
121
131
140
152
161
170
182
193
201
211
223
231
241
254
262
273
282
291
303
313
322
333
345
351
362
375
382
394
405
411
424
433
441
454
467
471
485
497
502

[0,0,0,0,0,0,0,0,0,0,0,1,1,0,2,1,0,2,3,1,1,3,1,1,
 4,2,3,2,1,3,3,2,3,5,1,2,5,2,4,5,1,4,3,1,4,7,1,5,7,
 2]