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”).

A298475 as a simple table

na(n)
11
22
31
42
51
62
71
82
91
102
112
122
132
142
151
162
171
182
192
202
211
222
232
242
252
262
271
282
292
302
311
322
331
342
352
362
373
383
392
402
413
422
432
443
451
462
472
482
492
503
511
523
532
542
552
562
572
582
592
602
612
622
631
642
651
662
672
682
693
703
712
722
731
742
753
762
772
783
792
802
813
822
833
842
851

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