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”).

A138819 as a simple table

na(n)
1236
2478
3616
4478
5616
6616
7478
8478
9616
10616
11478
12478
13616
14478
15478
16478
17616
18616
19616
20478
21616
22616
23616
24616
25616
26616
27616
28478
29478
30616
31478
32478
33616
34478
35616
36616
37616
38616
39616

[236,478,616,478,616,616,478,478,616,616,478,478,
 616,478,478,478,616,616,616,478,616,616,616,616,
 616,616,616,478,478,616,478,478,616,478,616,616,
 616,616,616]