a(n) = Pell(4n) / Pell(4).A091761a(n) = Pell(4n) / Pell(4).Terms a(0) =0a(1) =1a(2) =34a(3) =1155a(4) =39236a(5) =1332869a(6) =45278310a(7) =1538129671a(8) =52251130504External referencesoeis: A091761