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”).

A285721 as a simple table

na(n)
10
21
31
42
50
62
73
82
92
103
114
121
130
141
154
165
173
183
193
203
215
226
232
243
250
263
272
286
297
304
311
324
334
341
354
367
378
383
394
402
410
422
434
443
458
469
475
484
494
505
515
524
534
545
559
5610
574
582
591
604
610
624
631
642
654
6610
6711
686
695
705
714
726
736
744
755
765
776
7811
7912
805
815
823
835
843
850
863
875
883
895
905
9112
9213
937
943
955
961
972
987
997
1002
1011
1025
1033
1047
10513
10614
1076
1086
1092
1106
1113
1125
1130
1145
1153
1166
1172
1186
1196
12014

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