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”).

A293838 as a simple table

na(n)
11
22
31
41
52
61
72
81
91
101
112
121
131
142
151
162
171
181
192
201
211
222
231
242
251
261
271
282
291
301
312
321
332
341
352
361
371
382
391
402
411
421
431
442
451
461
472
481
492
501
511
522
531
541
552
561
572
581
591
601
612
621
631
642
651
661
672
681
691
702
711
722
731
741
751
762
771
781
792
801
812
821
831
842
851
861
872
881
892
901
911
921
932
941
951
962
971
982
991
1002

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