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”).

A264440 as a simple table

na(n)
11
21
31
41
51
62
71
82
91
102
111
124
131
142
152
163
171
184
191
204
212
222
231
246
251
262
272
284
291
306
311
324
332
342
352
367
371
382
392
406
411
426
431
444
454
462
471
488
491
504
512
524
531
546
552
566
572
582
591
6010
611
622
634
645
652
666
671
684
692
706
711
7210
731
742
754
764
772
786
791
808
813
822
831
8410
852
862

[1,1,1,1,1,2,1,2,1,2,1,4,1,2,2,3,1,4,1,4,2,2,1,6,
 1,2,2,4,1,6,1,4,2,2,2,7,1,2,2,6,1,6,1,4,4,2,1,8,1,
 4,2,4,1,6,2,6,2,2,1,10,1,2,4,5,2,6,1,4,2,6,1,10,1,
 2,4,4,2,6,1,8,3,2,1,10,2,2]