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”).

A072768 as a simple table

na(n)
11
22
32
43
53
63
73
84
94
103
114
124
135
144
154
164
175
185
195
205
214
224
235
246
255
266
275
284
294
305
316
326
336
346
355
364
374
385
396
406
417
426
436
445
454
465
475
486
496
507
517
526
536
545
555
565
576
586
596
607
617
627
636
646
656
665
675
686
697
706
717
727
737
747
756
767
776
785
795
806
817
827
837
847
857
867
877
887
897
906
915
925
936
947
957
968
977
987
997
1007
1018
1027
1037
1046
1055

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