FAQ about xterm-keys in emacs and vim, from Mark Oteiza.

examples/xterm-keys.vim

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+" tmux.vim - Set xterm input codes passed by tmux
+" Author:        Mark Oteiza
+" License:       Public domain
+" Description:   Simple plugin that assigns some xterm(1)-style keys to escape
+" sequences passed by tmux when "xterm-keys" is set to "on".  Inspired by an
+" example given by Chris Johnsen at:
+"     https://stackoverflow.com/a/15471820
+"
+" Documentation: help:xterm-modifier-keys man:tmux(1)
+
+if exists("g:loaded_tmux") || &cp
+  finish
+endif
+let g:loaded_tmux = 1
+
+function! s:SetXtermCapabilities()
+  set ttymouse=sgr
+
+  execute "set <xUp>=\e[1;*A"
+  execute "set <xDown>=\e[1;*B"
+  execute "set <xRight>=\e[1;*C"
+  execute "set <xLeft>=\e[1;*D"
+
+  execute "set <xHome>=\e[1;*H"
+  execute "set <xEnd>=\e[1;*F"
+
+  execute "set <Insert>=\e[2;*~"
+  execute "set <Delete>=\e[3;*~"
+  execute "set <PageUp>=\e[5;*~"
+  execute "set <PageDown>=\e[6;*~"
+
+  execute "set <xF1>=\e[1;*P"
+  execute "set <xF2>=\e[1;*Q"
+  execute "set <xF3>=\e[1;*R"
+  execute "set <xF4>=\e[1;*S"
+
+  execute "set <F5>=\e[15;*~"
+  execute "set <F6>=\e[17;*~"
+  execute "set <F7>=\e[18;*~"
+  execute "set <F8>=\e[19;*~"
+  execute "set <F9>=\e[20;*~"
+  execute "set <F10>=\e[21;*~"
+  execute "set <F11>=\e[23;*~"
+  execute "set <F12>=\e[24;*~"
+
+  execute "set t_kP=^[[5;*~"
+  execute "set t_kN=^[[6;*~"
+endfunction
+
+if exists('$TMUX')
+  call s:SetXtermCapabilities()