Trajectory of 270 under repeated application of k -> (phi(k)+sigma(k))/2.

Terms

a(0) =270a(1) =396a(2) =606a(3) =712a(4) =851a(5) =852a(6) =1148a(7) =1416a(8) =2032a(9) =2488a(10) =2960a(11) =4110a(12) =5512a(13) =6918a(14) =8076a(15) =10780a(16) =16044a(17) =23784a(18) =33720a(19) =55240a(20) =73230a(21) =97672a(22) =118470a(23) =169840a(24) =247224a(25) =350260a(26) =442848a(27) =728448a(28) =1213440a(29) =2124864