a(n) = (3*n+1)^(n-1).A052752a(n) = (3*n+1)^(n-1).Terms a(0) =1a(1) =1a(2) =7a(3) =100a(4) =2197a(5) =65536a(6) =2476099a(7) =113379904a(8) =6103515625a(9) =377801998336External referencesoeis: A052752