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”).

A178775 as a simple table

na(n)
13
22
33
43
52
63
73
82
93
102
112
122
133
143
153
162
173
182
192
203
212
222
233
242
253
262
273
283
292
303
313
322
333
343
352
363
373
383
393
403
413
423
432
443
452
463
473
483
493
502
513
522
532
542
553
562
573
583
592
603
613
622
633
643
652
663
672
682
692
703
712
723
733
743
753
762
773
782
793
803
813
823
833
843
853
862
873
883
892
903
913
922
933
943
952
963
972
983
992
1002

[3,2,3,3,2,3,3,2,3,2,2,2,3,3,3,2,3,2,2,3,2,2,3,2,
 3,2,3,3,2,3,3,2,3,3,2,3,3,3,3,3,3,3,2,3,2,3,3,3,3,
 2,3,2,2,2,3,2,3,3,2,3,3,2,3,3,2,3,2,2,2,3,2,3,3,3,
 3,2,3,2,3,3,3,3,3,3,3,2,3,3,2,3,3,2,3,3,2,3,2,3,2,
 2]