How to map Alt-PageUp in Vim?

Question

I know about this thread. Using sed -n l, I get the following output

for pageUp : ^[[5~

for alt+pageUp : ^[[5;3~

The alt+pageUp seems to be sending new char altogether and not combination of Pageup char ^[[5~ and some other char.

Answer 1

Found it. It was straight forward!

:map <A-PageUp> {rhs}