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A023990 as a simple table

na(n)
11
21
31
42
52
61
73
83
94
104
111
122
134
143
153
165
174
184
193
204
217
224
234
245
257
265
274
285
295
306
316
327
337
349
357
369
3711
388
399
409
419
428
436
447
457
466
476
488
499
508
518
529
5310
547
558
569
5710
5811
597
608
6111
6211
6310
6412
6513
6613
6712
6811
6914
7012
7111
7213
7314
7412
7512
7614
7714
7813
7914
8014
8115
8215
8313
8414
8514
8611
8710
8813
8912
9013
9113
9212
9315

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