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”).

A246869 as a simple table

na(n)
00
11
21
31
41
52
62
72
82
92
102
112
123
1311
142
152
162
172
182
193
203
213
2216
232
242
252
263
273
283
293
303
3152
322
333
343
353
363
373
383
394
404
418
423
433
443
453
463
473
484
494
5049
513
523
533
543
553
563
574
584
595
605
613
623
633
644
654
664
674
685
695
703
714
724
733
744
754
7611
775
788
794
803
813
823
834
844

[0,1,1,1,1,2,2,2,2,2,2,2,3,11,2,2,2,2,2,3,3,3,16,
 2,2,2,3,3,3,3,3,52,2,3,3,3,3,3,3,4,4,8,3,3,3,3,3,
 3,4,4,49,3,3,3,3,3,3,4,4,5,5,3,3,3,4,4,4,4,5,5,3,
 4,4,3,4,4,11,5,8,4,3,3,3,4,4]