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”).

A216864 as a simple table

na(n)
11
21
31
42
51
64
71
84
92
104
111
128
131
144
154
166
171
188
191
208
214
224
231
2421
252
264
274
288
291
3027
311
328
334
344
354
3625
371
384
394
4021
411
4227
431
448
458
464
471
4833
492
508
514
528
531
5421
554
5621
574
584
591
60112
611
624
638
6411
654
6627
671
688
694
7027
711
7270
731
744
758
768
774
7827
791
8033

[1,1,1,2,1,4,1,4,2,4,1,8,1,4,4,6,1,8,1,8,4,4,1,21,
 2,4,4,8,1,27,1,8,4,4,4,25,1,4,4,21,1,27,1,8,8,4,1,
 33,2,8,4,8,1,21,4,21,4,4,1,112,1,4,8,11,4,27,1,8,
 4,27,1,70,1,4,8,8,4,27,1,33]