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A167688 as a simple table

na(n)
10
20
30
40
50
60
70
80
90
100
110
120
130
140
150
161
170
180
190
200
210
220
230
241
250
260
270
280
290
300
310
322
330
340
350
362
370
380
390
401
410
420
430
440
450
460
470
484
490
500
510
520
530
541
550
561
570
580
590
602
610
620
630
645
650
660
670
680
690
700
710
726
730
740
750
760
770
780
790
804
811
820
830
842
850
860
870
881
890
902
910
920
930
940
950
969
970
980
990
1002
1010
1020
1030
1041
1050

[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,1,
 0,0,0,0,0,0,0,2,0,0,0,2,0,0,0,1,0,0,0,0,0,0,0,4,0,
 0,0,0,0,1,0,1,0,0,0,2,0,0,0,5,0,0,0,0,0,0,0,6,0,0,
 0,0,0,0,0,4,1,0,0,2,0,0,0,1,0,2,0,0,0,0,0,9,0,0,0,
 2,0,0,0,1,0]