Setting termcap entries: avoid literal Esc?

In my vimrc I have entries such as these:

set <s-right>=^[f
set <a-h>=^[h

where ^[ is a literal Esc. Is it possible to perform such assignments
without using a literal Esc? For other entries I am able to use the
& form (say, &t_BE = "\033[?2004h"). I am asking specifically about
entries like the above, which either don't have a corresponding option
in Vim AFAIK (<a-h>) or which have an option with special characters
(t_%i).

I am using Vim 9 script, if that matters.

Thanks,
Life.

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