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”).

A025886 as a simple table

na(n)
01
10
20
30
40
51
60
71
80
90
101
110
122
130
141
151
160
172
180
192
201
211
222
230
243
251
262
272
281
293
301
313
322
332
343
352
364
372
383
393
403
414
423
434
443
454
464
474
485
494
505
514
525
535
545
556
565
576
585
596
607
616
627
636
647
657
667
678
687
698
708
718
729
738
749
759
769
7710
789
7910

[1,0,0,0,0,1,0,1,0,0,1,0,2,0,1,1,0,2,0,2,1,1,2,0,
 3,1,2,2,1,3,1,3,2,2,3,2,4,2,3,3,3,4,3,4,3,4,4,4,5,
 4,5,4,5,5,5,6,5,6,5,6,7,6,7,6,7,7,7,8,7,8,8,8,9,8,
 9,9,9,10,9,10]