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”).

A072531 as a simple table

na(n)
10
20
31
41
51
61
72
81
92
101
113
121
133
142
153
162
173
182
195
203
215
223
235
242
256
263
276
283
296
303
317
326
335
346
357
363
377
385
398
404
418
424
4310
446
458
467
479
486
4910
507
519
528
5311
546
5511
569
5710
587
5911
605
6114
629
6311
649
6511
668
6715
689
6913
708
7114
728
7314
7412
7514
7611
7715
789
7915
8011
8114
8212
8318
8410
8516
8614
8715
8813
8916
909

[0,0,1,1,1,1,2,1,2,1,3,1,3,2,3,2,3,2,5,3,5,3,5,2,
 6,3,6,3,6,3,7,6,5,6,7,3,7,5,8,4,8,4,10,6,8,7,9,6,
 10,7,9,8,11,6,11,9,10,7,11,5,14,9,11,9,11,8,15,9,
 13,8,14,8,14,12,14,11,15,9,15,11,14,12,18,10,16,
 14,15,13,16,9]