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”).

A355899 as a simple table

na(n)
11
21
31
41
53
61
71
83
91
105
111
121
131
141
151
161
171
181
191
201
211
221
231
245
251
261
275
281
291
301
311
321
3311
341
353
363
373
383
393
403
411
421
433
443
451
461
471
481
491
507
5117
523
531
541
553
563
573
585
591
603
611
621
631
641
651
661
671
683
691
701
713
723
731
741
751
761
771
781
791
803
811
821
831
8471
8571
865
871
881
895
901
913
921
9313
943
951
965
9715
981
991
1005

[1,1,1,1,3,1,1,3,1,5,1,1,1,1,1,1,1,1,1,1,1,1,1,5,
 1,1,5,1,1,1,1,1,11,1,3,3,3,3,3,3,1,1,3,3,1,1,1,1,
 1,7,17,3,1,1,3,3,3,5,1,3,1,1,1,1,1,1,1,3,1,1,3,3,
 1,1,1,1,1,1,1,3,1,1,1,71,71,5,1,1,5,1,3,1,13,3,1,
 5,15,1,1,5]