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”).

A220197 as a simple table

na(n)
14
210
3238
46855
5527350
6154837661

[4,10,238,6855,527350,154837661]