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”).

A263723 as a simple table

na(n)
11
21
31
41
52
61
71
81
91
102
111
121
132
141
151
161
172
181
192
202
212
221
231
241
252
261
271
281
291
301
311
321
332
342
353
362
372
381
391
401
411
421
431
441
452
462
471
481
492
501
511
523
531
541
551
562
572
582
591
601
611
622
631
641
651
662
671
682
691
701
712
721
731
741
754
761
771
781
791
804
812
822
831
842
851
862
872
881
891
901
911
921
932
941
951
961
971
981
991
1001
1011
1021
1032
1041
1051

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