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A188221 as a simple table

na(n)
10
20
30
41
50
60
70
81
90
100
110
121
130
140
150
161
170
180
190
200
211
220
230
240
251
260
270
280
291
300
310
320
331
340
350
360
370
381
390
400
410
421
430
440
450
461
470
480
490
501
510
520
530
540
551
560
570
580
591
600
610
620
631
640
650
660
671
680
690
700
710
721
730
740
750
761
770
780
790
801
810
820
830
841
850
860
870
881
890
900
910
920
931
940
950
960
971
980
990
1000
1011
1020
1030
1040
1051
1060
1070
1080
1090
1101
1110
1120
1130
1141
1150
1160
1170
1181
1190
1200
1210
1221
1230
1240
1250
1260
1271
1280
1290
1300
1311
1320
1330
1340
1351
1360
1370
1380
1391
1400
1410
1420
1430
1441
1450
1460
1470
1481

[0,0,0,1,0,0,0,1,0,0,0,1,0,0,0,1,0,0,0,0,1,0,0,0,
 1,0,0,0,1,0,0,0,1,0,0,0,0,1,0,0,0,1,0,0,0,1,0,0,0,
 1,0,0,0,0,1,0,0,0,1,0,0,0,1,0,0,0,1,0,0,0,0,1,0,0,
 0,1,0,0,0,1,0,0,0,1,0,0,0,1,0,0,0,0,1,0,0,0,1,0,0,
 0,1,0,0,0,1,0,0,0,0,1,0,0,0,1,0,0,0,1,0,0,0,1,0,0,
 0,0,1,0,0,0,1,0,0,0,1,0,0,0,1,0,0,0,0,1,0,0,0,1]