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A161687 as a simple table

na(n)
00
11
23
318
42
51
61
71
810
91
109
112
121
135
141
153
161
174
181
191
201
211
221
233
243
252
267
2717
281
292
301
313
321
336
341
351
362
373
383
398
403
415
421
433
448
451
462
4760
483
491
507
512
521
531
547
552
561
571
582
592
602
6123
621
6310
645
651
661
672
6818
691
701
714
7213
731
744
7557
761
7715
782
791
803
814
823
831
842
852
861
871
883
892
907
913
921
932
941
952
963
971
983
993
1002

[0,1,3,18,2,1,1,1,10,1,9,2,1,5,1,3,1,4,1,1,1,1,1,
 3,3,2,7,17,1,2,1,3,1,6,1,1,2,3,3,8,3,5,1,3,8,1,2,
 60,3,1,7,2,1,1,7,2,1,1,2,2,2,23,1,10,5,1,1,2,18,1,
 1,4,13,1,4,57,1,15,2,1,3,4,3,1,2,2,1,1,3,2,7,3,1,
 2,1,2,3,1,3,3,2]