a(n) = Product_{k=1..n} (169 - 13/k).A216788a(n) = Product_{k=1..n} (169 - 13/k).Terms a(0) =1a(1) =156a(2) =25350a(3) =4174300a(4) =691890225a(5) =115130533440External referencesoeis: A216788