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Iterating through numbers using seq () and rep ()

I need to use rep()and seq()to get the following vector:

1 2 3 4 5 2 3 4 5 6 3 4 5 6 7 4 5 6 7 8 5 6 7 8 9

I usually just use the operator forin order to achieve this, but I'm limited to this use and can be used rep(), and seq()to achieve this vector.

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2 answers
> 1:5 + rep(0:4, each=5)
 [1] 1 2 3 4 5 2 3 4 5 6 3 4 5 6 7 4 5 6 7 8 5 6 7 8 9
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One liner

do.call(c,sapply(1:5,seq,length.out=5,simplify=FALSE))

Or even easier

rep(seq(5),each=5)+seq(5)-1
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