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”).

A117454 as a simple table

na(n)
11
21
31
41
51
60
71
81
91
100
111
121
130
142
150
161
171
181
190
202
210
221
231
240
251
261
272
280
291
301
311
321
331
341
352
360
371
381
390
401
412
422
431
442
450
461
471
481
490
502
512
522
531
542
550
561
571
580
592
600
613
623
632
641
652
660
671
681
691
700
712
722
733
743
752
761
772
780
791
801
810
821
832
842
853
864
873
882
891
902
910
921
931
941
951
961
973
984
993
1004
1013
1022
1031
1042
1050

[1,1,1,1,1,0,1,1,1,0,1,1,0,2,0,1,1,1,0,2,0,1,1,0,
 1,1,2,0,1,1,1,1,1,1,2,0,1,1,0,1,2,2,1,2,0,1,1,1,0,
 2,2,2,1,2,0,1,1,0,2,0,3,3,2,1,2,0,1,1,1,0,2,2,3,3,
 2,1,2,0,1,1,0,1,2,2,3,4,3,2,1,2,0,1,1,1,1,1,3,4,3,
 4,3,2,1,2,0]