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”).

A044946 as a simple table

na(n)
11
21
31
41
51
62
70
82
92
102
112
122
132
140
152
162
172
182
192
202
210
222
232
242
252
262
272
280
292
302
312
322
332
342
350
361
373
383
393
403
413
421
431
441
451
461
471
483
493
501
513
523
533
543
553
563
571
583
593
603
613
623
633
641
653
663
673
683
693
703
711
721
733
743
753
763
773
783
791
803
813
823
833
841
851
861
871
881
891
903

[1,1,1,1,1,2,0,2,2,2,2,2,2,0,2,2,2,2,2,2,0,2,2,2,
 2,2,2,0,2,2,2,2,2,2,0,1,3,3,3,3,3,1,1,1,1,1,1,3,3,
 1,3,3,3,3,3,3,1,3,3,3,3,3,3,1,3,3,3,3,3,3,1,1,3,3,
 3,3,3,3,1,3,3,3,3,1,1,1,1,1,1,3]