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”).

A180607 as a simple table

na(n)
11
21
38
4182
513198
63031856
72198620478
85017961787334
935964266585527318

[1,1,8,182,13198,3031856,2198620478,5017961787334,
 35964266585527318]