a(n) = (4*(n+15)^n + n^n)/5.A083306a(n) = (4*(n+15)^n + n^n)/5.Terms a(0) =1a(1) =13a(2) =232a(3) =4671a(4) =104308a(5) =2560625a(6) =68622228a(7) =1995651019a(8) =62652143668External referencesoeis: A083306