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A307720 as a simple table

na(n)
11
21
32
41
53
61
73
82
92
102
112
122
133
142
153
162
173
183
193
203
213
223
233
243
253
263
274
282
294
302
314
322
334
342
354
363
374
383
394
403
414
423
434
443
454
463
475
481
495
501
515
521
537
541
557
561
577
581
597
602
615
622
635
642
655
662
675
682
695
702
717
722
737
742
757
762
777
782
797
802
817
822
837
843
855
863
875
883
895
903
915
923
935
943
955
963
975
983
996
1003
1016
1023
1036
1043
1056
1063
1076
1083
1096
1103
1116
1123
1136
1143
1156
1163
1177
1183
1197
1203
1217
1223
1237
1243
1257
1263
1277
1283
1297
1303
1317
1323
1337
1343
1357
1363
1378
1382
1398

[1,1,2,1,3,1,3,2,2,2,2,2,3,2,3,2,3,3,3,3,3,3,3,3,
 3,3,4,2,4,2,4,2,4,2,4,3,4,3,4,3,4,3,4,3,4,3,5,1,5,
 1,5,1,7,1,7,1,7,1,7,2,5,2,5,2,5,2,5,2,5,2,7,2,7,2,
 7,2,7,2,7,2,7,2,7,3,5,3,5,3,5,3,5,3,5,3,5,3,5,3,6,
 3,6,3,6,3,6,3,6,3,6,3,6,3,6,3,6,3,7,3,7,3,7,3,7,3,
 7,3,7,3,7,3,7,3,7,3,7,3,8,2,8]