5^p - 4^p - 1, where p is prime.A2420845^p - 4^p - 1, where p is prime.Terms a(0) =8a(1) =60a(2) =2100a(3) =61740a(4) =44633820a(5) =1153594260a(6) =745759583940External referencesoeis: A242084