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”).

A269978 as a simple table

na(n)
11
22
32
43
51
62
72
81
91
101
111
123
131
144
152
161
171
183
191
201
212
221
231
242
252
262
273
283
292
303
311
321
331
341
353
362
371
382
391
401
411
422
432
444
453
463
471
481
492
501
511
522
531
543
551
562
571
583
591
601
611
621
633
642
652
661
673
681
691
703
712
723
731
742
751
762
771
782
791
803
812
823
832
842
851
861

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