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A273620 as a simple table

na(n)
12
23
31
44
52
61
75
84
93
102
116
124
133
144
152
167
175
185
194
202
212
228
237
245
256
264
272
282
299
307
316
326
334
344
352
362
3710
388
398
408
416
424
435
442
453
4611
479
488
498
506
517
525
535
543
553
5612
5711
5810
5910
608
617
625
635
646
653
663
6713
6811
6910
7010
718
727
737
745
756
763
773
783
7914
8012
8112
8212

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