a(n) = n^7 * 7^n.A098803a(n) = n^7 * 7^n.Terms a(0) =0a(1) =7a(2) =6272a(3) =750141a(4) =39337984a(5) =1313046875a(6) =32934190464a(7) =678223072849External referencesoeis: A098803