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A138948 as a simple table

na(n)
12
21
31
43
50
60
70
82
90
100
111
120
131
140
150
162
171
180
190
200
210
221
230
240
251
260
270
280
290
301
311
320
330
340
350
360
374
380
390
400
410
420
430
440
450
461
472
480
490
500
510
520
530
540
550
562
570
581
590
600
610
620
630
640
650
660
670
681
690
701
710
720
730
740
750
760
770
780
791
800
810
820
831
840
850
860
870
880
890
900
910
923
931
940
950
960
970
980
990
1000
1010
1020
1030
1040
1050

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