login

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

A059689 as a simple table

na(n)
11
21
31
41
52
62
71
82
92
101
111
121
131
141
152
161
171
183
191
202
211
221
232
242
251
262
273
281
293
301
311
323
332
341
353
363
372
381
391
402
411
422
432
441
453
462
472
481
492
502
512
522
532
543
552
563
571
582
593
602
612
623
633
643
651
661

[1,1,1,1,2,2,1,2,2,1,1,1,1,1,2,1,1,3,1,2,1,1,2,2,
 1,2,3,1,3,1,1,3,2,1,3,3,2,1,1,2,1,2,2,1,3,2,2,1,2,
 2,2,2,2,3,2,3,1,2,3,2,2,3,3,3,1,1]