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”).

A078181 as a simple table

na(n)
11
21
31
45
51
61
78
85
91
1011
111
125
1314
148
151
1621
171
181
1920
2015
218
2223
231
245
2526
2614
271
2840
291
3011
3132
3221
331
3435
358
365
3738
3820
3914
4055
411
428
4344
4427
451
4647
471
4821
4957
5036
511
5270
531
541
5556
5640
5720
5859
591
6015
6162
6232
638
6485
6514
6623
6768
6839
691
7088
711
725
7374
7438
7526
76100
778
7814
7980
8071
811

[1,1,1,5,1,1,8,5,1,11,1,5,14,8,1,21,1,1,20,15,8,
 23,1,5,26,14,1,40,1,11,32,21,1,35,8,5,38,20,14,55,
 1,8,44,27,1,47,1,21,57,36,1,70,1,1,56,40,20,59,1,
 15,62,32,8,85,14,23,68,39,1,88,1,5,74,38,26,100,8,
 14,80,71,1]