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”).

A156637 as a simple table

na(n)
00
11
22
35
43
52
67
77
83
94
102
118
120
138
147
154
166
177
182
192
206
215
227
231
240
251
262
275
283
292
307
317
323
334
342
358
360
378
387
394
406
417
422
432
446
455
467
471
480
491
502
515
523
532
547
557
563
574
582
598
600
618
627
634
646
657
662
672
686
695
707
711
720
731
742
755
763
772
787
797
803
814
822
838
840
858
867
874
886
897
902
912
926
935
947
951

[0,1,2,5,3,2,7,7,3,4,2,8,0,8,7,4,6,7,2,2,6,5,7,1,
 0,1,2,5,3,2,7,7,3,4,2,8,0,8,7,4,6,7,2,2,6,5,7,1,0,
 1,2,5,3,2,7,7,3,4,2,8,0,8,7,4,6,7,2,2,6,5,7,1,0,1,
 2,5,3,2,7,7,3,4,2,8,0,8,7,4,6,7,2,2,6,5,7,1]