a(n) = n!*LaguerreL(n, -5*n).A277419a(n) = n!*LaguerreL(n, -5*n).Terms a(0) =1a(1) =6a(2) =142a(3) =5676a(4) =318744a(5) =23046370a(6) =2038090320a(7) =213094791840External referencesoeis: A277419