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”).

A268820 as a simple table

na(n)
00
11
20
32
41
50
63
73
81
90
104
116
123
131
140
155
162
172
183
191
200
216
2212
237
242
253
261
270
287
294
306
316
322
333
341
350
368
377
3813
395
406
412
423
431
440
459
465
4712
487
497
506
512
523
531
540
5510
5624
575
5815
594
607
616
622
633
641
650
6611
678
684
6913
705
715
727
736
742
753
761
770
7812
7911
8025
814
8214
8312
845
857
866
872
883
891
900
9113
929
9324
9412
9515
964
974
985
997
1006
1012
1023
1031
1040
10514
10613
1079
10827
10912
11010
11113
1124
1135
1147
1156
1162
1173
1181
1190

[0,1,0,2,1,0,3,3,1,0,4,6,3,1,0,5,2,2,3,1,0,6,12,7,
 2,3,1,0,7,4,6,6,2,3,1,0,8,7,13,5,6,2,3,1,0,9,5,12,
 7,7,6,2,3,1,0,10,24,5,15,4,7,6,2,3,1,0,11,8,4,13,
 5,5,7,6,2,3,1,0,12,11,25,4,14,12,5,7,6,2,3,1,0,13,
 9,24,12,15,4,4,5,7,6,2,3,1,0,14,13,9,27,12,10,13,
 4,5,7,6,2,3,1,0]