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”).

A068320 as a simple table

na(n)
10
21
31
40
52
60
72
81
91
101
111
121
132
141
152
162
171
182
192
202
212
222
231
243
251
262
270
282
291
303
312
322
333
343
350
364
371
381
393
403
411
424
432
443
451
463
471
485
491
504
513
523
531
545
551
564
571
583
591
606
612
622
631
645
650
666
671
682
694
705
711
726
732
744
751
765
770
787
791
805
811
824
831
848
852
864
873
884
891
909
911
925
932
944
950
967
971

[0,1,1,0,2,0,2,1,1,1,1,1,2,1,2,2,1,2,2,2,2,2,1,3,
 1,2,0,2,1,3,2,2,3,3,0,4,1,1,3,3,1,4,2,3,1,3,1,5,1,
 4,3,3,1,5,1,4,1,3,1,6,2,2,1,5,0,6,1,2,4,5,1,6,2,4,
 1,5,0,7,1,5,1,4,1,8,2,4,3,4,1,9,1,5,2,4,0,7,1]