Using numpad in Vi (Vim) via PuTTY

Question

The numberpad does not work properly when using Vim through PuTTY. Instead of numbers I get

y
x
w
v
u
t
s
r
q

Answer 1

I have always used this set of mappings to interpret the escape sequences as numbers when $TERM=xterm

imap Oq 1
imap Or 2
imap Os 3
imap Ot 4
imap Ou 5
imap Ov 6
imap Ow 7
imap Ox 8
imap Oy 9
imap Op 0
imap On .
imap OR *
imap OQ /
imap Ol +
imap OS -

I think this was my original source.