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”).

A186520 as a simple table

na(n)
11
21
31
41
51
62
74
81
91
102
114
123
135
1410
152
161
171
182
194
203
215
2210
232
244
257
2612
272
2816
2947
306
3122
321
331
342
354
363
375
3810
3910
404
416
4212
432
4418
452
464
4710
485
497
5017
512
5219
5355
546
5528
5622
5749
58120
598
6012

[1,1,1,1,1,2,4,1,1,2,4,3,5,10,2,1,1,2,4,3,5,10,2,
 4,7,12,2,16,47,6,22,1,1,2,4,3,5,10,10,4,6,12,2,18,
 2,4,10,5,7,17,2,19,55,6,28,22,49,120,8,12]