a(n) = (6*n+1) * (7*n+1)^(n-2) * 8^n.A251698a(n) = (6*n+1) * (7*n+1)^(n-2) * 8^n.Terms a(0) =1a(1) =7a(2) =832a(3) =214016a(4) =86118400a(5) =47393538048External referencesoeis: A251698