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”).

A102853 as a simple table

na(n)
01
11
22
31
43
52
63
71
82
93
102
112
123
131
143
151
164
172
182
193
202
213
222
232
243
251
264
272
283
293
303
312
323
332
343
351
363
372
383
393
405
412
422
432
444
452
464
472
482
493
504
513
522
531
546
552
563
571
584
592
603
614
623
631
643
652
663
671
683
692
702
715
724
732
744
752
763
771
782
794
802
813
824
832
844
852
864
871
882
894
903
912
922
933
944
951
965
971
982
992
1003

[1,1,2,1,3,2,3,1,2,3,2,2,3,1,3,1,4,2,2,3,2,3,2,2,
 3,1,4,2,3,3,3,2,3,2,3,1,3,2,3,3,5,2,2,2,4,2,4,2,2,
 3,4,3,2,1,6,2,3,1,4,2,3,4,3,1,3,2,3,1,3,2,2,5,4,2,
 4,2,3,1,2,4,2,3,4,2,4,2,4,1,2,4,3,2,2,3,4,1,5,1,2,
 2,3]