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A188672 as a simple table

na(n)
10
20
30
40
50
60
72
84
90
102
113
120
130
140
156
162
172
183
192
207
214
222
234
240
252
267
272
282
294
303
312
322
334
342
354
364
372
382
393
405
415
422
432
443
452
462
472
483
492
504
513
522
533
544
552
560
572
582
592
605
612
623
634
642
655
662
672
683
693
702
712
722
732
744
754
762
772
783
792
802
813
822
834
843
852
863
872

[0,0,0,0,0,0,2,4,0,2,3,0,0,0,6,2,2,3,2,7,4,2,4,0,
 2,7,2,2,4,3,2,2,4,2,4,4,2,2,3,5,5,2,2,3,2,2,2,3,2,
 4,3,2,3,4,2,0,2,2,2,5,2,3,4,2,5,2,2,3,3,2,2,2,2,4,
 4,2,2,3,2,2,3,2,4,3,2,3,2]