Simply Riddleculous

Question

^{An entry in the 19th fortnightly challenge to which I have been assigned riddle + number-sequence by Alconja who came up with the Uncoventional Tag Fusion Idea. If you have any queries you can ask them in the chat room.}

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Alright now, you should listen close.
A number sequence, lets see how it goes.
But of course, I'm not going to tell you.
Care to wait and I'll sell you a clue.
Even when you have no idea what to say.
Have faith and realise this is just a display
Maybe sometimes you should check before
Unfortunately I can't go on any more...

What is the sequence?

Answer 1

The

initial letters of the lines have indices 1, 1, 2, 3, 5, 8, 13, 21 in the alphabet

so this is

the Fibonacci sequence.

Most of the text is

just scaffolding to provide a place for those initial letters to live.

As Deusovi's answer points out, the reason why "I can't go on any more" is that

there is no 34th letter in our alphabet.

Beastly Gerbil also requests, in comments, an explanation for "Maybe sometimes you should just check before"; although this turns out not to be B.G.'s original intention, it works nicely as a reference to

the fact that each Fibonacci number is derived from its two predecessors.

Answer 2

The number sequence is

the Fibonacci Sequence. The first letters of each lines are the sequence converted to letters (A=1...Z=26).

Alright now, you should listen close.

Filler line.

A number sequence, lets see how it goes.

Reminding us that we're looking for a number sequence.

But of course, I'm not going to tell you.

Well, it's not stated in the riddle!

Care to wait and I'll sell you a clue.

The more lines you read, the more clues you get.

Even when you have no idea what to say.

Filler line.

Have faith and realise this is just a display

The riddle itself "displays" the sequence with its first letters.

Maybe sometimes you should check before

Each term refers to the previous terms. (And if you don't look at the previous lines, you don't have much of a chance of solving it!)

Unfortunately I can't go on any more...

There's no 34th letter of the alphabet.