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A047764 as a simple table

na(n)
10
21
30
40
50
60
70
81
90
100
110
120
130
141
150
160
170
180
190
202
210
220
230
240
250
263
270
280
290
300
310
327
330
340
350
360
370
3812
390
400
410
420
430
4430
450
460
470
480
490
5055
510
520
530
540
550
56143
570
580
590
600
610
62273
630
640
650
660
670
68728
690
700
710
720
730
741428
750
760
770
780
790
803876
810
820
830
840
850
867752

[0,1,0,0,0,0,0,1,0,0,0,0,0,1,0,0,0,0,0,2,0,0,0,0,
 0,3,0,0,0,0,0,7,0,0,0,0,0,12,0,0,0,0,0,30,0,0,0,0,
 0,55,0,0,0,0,0,143,0,0,0,0,0,273,0,0,0,0,0,728,0,
 0,0,0,0,1428,0,0,0,0,0,3876,0,0,0,0,0,7752]