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”).

A251719 as a simple table

na(n)
11
21
31
42
53
63
73
83
94
104
114
124
134
145
155
165
175
185
195
205
215
225
235
245
255
265
275
286
296
306
316
326
336
346
356
367
377
387
397
407
417
427
437
447
457
467
477
487
497
507
517
527
537
547
557
567
578
588
598
608
618
628
638
648
658
668
679
689
699
709
719
729
739
749
759
769
779
789
799
809
819
829
839
849
859
869
879
889
899
909
919
929
9310

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