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”).

A253719 as a simple table

na(n)
01
11
22
32
42
52
63
72
82
92
102
114
122
134
144
152
162
172
182
192
203
216
225
234
242
254
262
278
283
298
305
312
322
332
342
352
362
372
383
396
402
412
424
4312
442
454
464
474
482
494
502
5110
523
5314
546
558
562
578
586
5916
603
6116
626
632
642
652
662
672
682
692
704
712
723
734
744
754
762
774
784
796
802
812
825
838
844

[1,1,2,2,2,2,3,2,2,2,2,4,2,4,4,2,2,2,2,2,3,6,5,4,
 2,4,2,8,3,8,5,2,2,2,2,2,2,2,3,6,2,2,4,12,2,4,4,4,
 2,4,2,10,3,14,6,8,2,8,6,16,3,16,6,2,2,2,2,2,2,2,4,
 2,3,4,4,4,2,4,4,6,2,2,5,8,4]