where to start? - crypto analysis task

Hi all,

my first question here on the board and hopefully someony here can give me a hint on how to work my way through:

The following is a task a friend (maths student) gave to me:

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What's hidden in this number sequence?

7 22 12 16 13 33 38 33 28 43 35 49 50 46 55 75 68 66 79 76 89 97 92 102 123 102 111 119 114 127

hint: the hidden text correlates with the concept of the encryption type.

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So thats all the info. I have not a single clue where to start. I just hope it's not just a so basic task that i feel too dumb in the end...
Any help is greatly appreciated!

Thanks so far.
ooze