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”).

A175244 as a simple table

na(n)
11
21
31
41
51
61
72
81
92
101
111
122
131
141
151
162
172
182
193
201
213
221
231
243
251
261
271
283
292
303
311
322
333
341
351
362
373
384
391
404
411
421
434
441
451
461
474
482
494
501
512
524
531
541
552
564
571
581
591
602
614
622
632
644
655
661
675
681
691
705
711
721
731
745
752
765
771
782
795
801
811
822
835
841
851
861
872
885
892
902
915
923
935

[1,1,1,1,1,1,2,1,2,1,1,2,1,1,1,2,2,2,3,1,3,1,1,3,
 1,1,1,3,2,3,1,2,3,1,1,2,3,4,1,4,1,1,4,1,1,1,4,2,4,
 1,2,4,1,1,2,4,1,1,1,2,4,2,2,4,5,1,5,1,1,5,1,1,1,5,
 2,5,1,2,5,1,1,2,5,1,1,1,2,5,2,2,5,3,5]