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”).

A117170 as a simple table

na(n)
11
21
31
42
50
61
72
81
90
101
113
121
130
140
151
163
172
181
190
200
211
224
231
241
250
260
270
281
293
303
311
321
330
340
350
361
376
381
392
401
410
420
430
440
451
465
474
481
491
501
510
520
530
540
551
565
572
582
591
601
610
620
630
640
650
661
676
684
692
702
711
721
730
740
750
760
770
781
797
802
812
821
831
841
850
860
870
880
890
900
911
927
936
942
952
961
971
981
990
1000
1010
1020
1030
1040
1051

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