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”).

A371212 as a simple table

na(n)
11
20
30
40
51
61
71
81
91
101
111
121
131
141
151
161
171
181
191
201
211
221
231
241
252
261
271
281
291
303
311
321
331
341
353
362
371
381
391
403
411
423
431
441
453
461
471
483
492
503
511
521
531
543
553
563
571
581
591
605
611
621
633
642
653
663
671
681
691
705
711
725
731
741
753
761
773
783
791
805
812
821
831
845
853
861
871
883
891
907
913
921

[1,0,0,0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
 2,1,1,1,1,3,1,1,1,1,3,2,1,1,1,3,1,3,1,1,3,1,1,3,2,
 3,1,1,1,3,3,3,1,1,1,5,1,1,3,2,3,3,1,1,1,5,1,5,1,1,
 3,1,3,3,1,5,2,1,1,5,3,1,1,3,1,7,3,1]