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”).

A033925 as a simple table

na(n)
11
21
32
43
54
61
72
83
94
105
112
123
134
145
156
163
174
185
196
207
214
225
236
247
258
262
273
284
295
306
313
324
335
346
357
364
375
386
397
408
415
426
437
448
459
466
477
488
499
5010
514
525
536
547
558
565
576
587
598
609
616
627
638
649
6510
667
678
689
6910
7011
718
729
7310
7411
7512
766
777
788
799
8010
817
828
839
8410
8511
868
879
8810
8911
9012
919
9210
9311
9412
9513

[1,1,2,3,4,1,2,3,4,5,2,3,4,5,6,3,4,5,6,7,4,5,6,7,
 8,2,3,4,5,6,3,4,5,6,7,4,5,6,7,8,5,6,7,8,9,6,7,8,9,
 10,4,5,6,7,8,5,6,7,8,9,6,7,8,9,10,7,8,9,10,11,8,9,
 10,11,12,6,7,8,9,10,7,8,9,10,11,8,9,10,11,12,9,10,
 11,12,13]