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”).

A070084 as a simple table

na(n)
11
21
32
41
51
61
71
81
93
102
111
121
131
141
151
161
171
184
191
201
211
221
231
242
251
262
271
281
291
301
313
321
331
345
351
361
371
382
391
401
411
421
431
441
451
461
471
482
491
502
511
521
531
546
551
561
571
581
591
601
611
621
631
641
651
661
671
684
691
701
712
721
731
741
751
763
771
781
791
801
811
823
831
847
852
861
872
881
891
901

[1,1,2,1,1,1,1,1,3,2,1,1,1,1,1,1,1,4,1,1,1,1,1,2,
 1,2,1,1,1,1,3,1,1,5,1,1,1,2,1,1,1,1,1,1,1,1,1,2,1,
 2,1,1,1,6,1,1,1,1,1,1,1,1,1,1,1,1,1,4,1,1,2,1,1,1,
 1,3,1,1,1,1,1,3,1,7,2,1,2,1,1,1]