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A237447 as a simple table

na(n)
11
22
32
43
51
63
74
83
91
104
115
124
132
141
155
166
175
184
192
201
216
227
236
245
253
262
271
287
298
307
316
325
333
342
351
368
379
388
397
406
414
423
432
441
459
4610
479
488
497
506
514
523
532
541
5510
5611
5710
589
598
607
615
624
633
642
651
6611
6712
6811
6910
709
718
727
735
744
753
762
771
7812
7913
8012
8111
8210
839
848
856
865
874
883
892
901
9113
9214
9313
9412
9511
9610
979
988
996
1005
1014
1023
1032
1041
10514
10615
10714
10813
10912
11011
11110
1129
1137
1146
1155
1164
1173
1182
1191
12015

[1,2,2,3,1,3,4,3,1,4,5,4,2,1,5,6,5,4,2,1,6,7,6,5,
 3,2,1,7,8,7,6,5,3,2,1,8,9,8,7,6,4,3,2,1,9,10,9,8,
 7,6,4,3,2,1,10,11,10,9,8,7,5,4,3,2,1,11,12,11,10,
 9,8,7,5,4,3,2,1,12,13,12,11,10,9,8,6,5,4,3,2,1,13,
 14,13,12,11,10,9,8,6,5,4,3,2,1,14,15,14,13,12,11,
 10,9,7,6,5,4,3,2,1,15]