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”).

A197796 as a simple table

na(n)
11
27
345
4630
516377
6793262
773405633
812833817343
94231690321114
102639675473285623

[1,7,45,630,16377,793262,73405633,12833817343,
 4231690321114,2639675473285623]