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”).

A074265 as a simple table

na(n)
11
21
32
41
51
62
72
81
92
102
111
122
132
141
152
162
171
182
191
202
212
222
231
242
251
261
272
281
292
302
311
321
332
341
351
362
371
381
392
402
411
422
432
441
452
461
472
482
491
502
512
521
531
542
551
561
572
582
591
602
612
621
632
641
652
662
672
681
691
702
711
722
731
741
752
762
772
781
792
801
812
822
832
841
852
861

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