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”).

A307239 as a simple table

na(n)
01
11
21
31
42
51
61
73
83
91
101
112
126
132
141
151
163
172
182
193
201
211
222
235
242
255
262
271
281
293
307
317
327
337
343
351
361
372
3810
3914
4014
4114
4210
432
441
451
463
476
486
4914
5014
516
526
533
541
551
562
573
586
5910
6014
6110
626
633
642
651
661
673
685
693
702
716
726
732
743
755
763
771
781
792
802
812
825
832
846
852
865
872
882
892
901

[1,1,1,1,2,1,1,3,3,1,1,2,6,2,1,1,3,2,2,3,1,1,2,5,
 2,5,2,1,1,3,7,7,7,7,3,1,1,2,10,14,14,14,10,2,1,1,
 3,6,6,14,14,6,6,3,1,1,2,3,6,10,14,10,6,3,2,1,1,3,
 5,3,2,6,6,2,3,5,3,1,1,2,2,2,5,2,6,2,5,2,2,2,1]