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A181566 as a simple table

na(n)
10
20
30
42
50
60
70
84
93
100
110
123
130
140
150
168
170
183
190
204
210
220
230
247
255
260
278
285
290
300
310
3216
330
340
350
369
370
380
390
4012
410
420
430
445
454
460
470
4819
497
505
510
526
530
5412
550
5616
570
580
590
606
610
620
635
6437
650
660
670
686
690
700
710
7220
730
740
755
766
770
780
790
8032
8127
820
830
846
850
860
870
8826
890
905
910
927
930
940
950

[0,0,0,2,0,0,0,4,3,0,0,3,0,0,0,8,0,3,0,4,0,0,0,7,
 5,0,8,5,0,0,0,16,0,0,0,9,0,0,0,12,0,0,0,5,4,0,0,
 19,7,5,0,6,0,12,0,16,0,0,0,6,0,0,5,37,0,0,0,6,0,0,
 0,20,0,0,5,6,0,0,0,32,27,0,0,6,0,0,0,26,0,5,0,7,0,
 0,0]