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”).

A040449 as a simple table

na(n)
021
11
22
32
41
53
64
714
84
93
101
112
122
131
1442
151
162
172
181
193
204
2114
224
233
241
252
262
271
2842
291
302
312
321
333
344
3514
364
373
381
392
402
411
4242
431
442
452
461
473
484
4914
504
513
521
532
542
551
5642
571
582
592
601
613
624
6314
644
653
661
672
682
691
7042
711
722
732
741
753
764
7714
784
793
801
812
822
831
8442
851
862

[21,1,2,2,1,3,4,14,4,3,1,2,2,1,42,1,2,2,1,3,4,14,
 4,3,1,2,2,1,42,1,2,2,1,3,4,14,4,3,1,2,2,1,42,1,2,
 2,1,3,4,14,4,3,1,2,2,1,42,1,2,2,1,3,4,14,4,3,1,2,
 2,1,42,1,2,2,1,3,4,14,4,3,1,2,2,1,42,1,2]