a(n) = 4*(n+4)^(n-1).A362355a(n) = 4*(n+4)^(n-1).Terms a(0) =1a(1) =4a(2) =24a(3) =196a(4) =2048a(5) =26244a(6) =400000a(7) =7086244a(8) =143327232a(9) =3262922884a(10) =82644187136External referencesoeis: A362355