Hexagony, 14 bytes

?}1{.=@!'(<>._ 

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Layed out

 ? } 1 { . = @ ! ' ( < > . _ . . . . . 

Explanation

?}1 take input in the initial cell, and put 1 in the cell to its right.

!'( output 1, return to the initial cell and decrement

< branch, if 0 go to @ and terminate, otherwise point the IP southeast

{'_ go to the right cell again but flipped, reflect IP to the northeast

(=1 flip the MP back to how it was last time, decrement and add 1, keeping this cell at 1 still

> go back to east travel, restart the loop

Hexagony, 14 12 bytes

(}?@_.)<!>*' 

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Layed out

 ( } ? @ _ . ) < ! > * ' . . . . . . . 

Explanation

(}? some irrelevant operations initially, then get the input

< branch, if 0 go to @ and terminate, otherwise point the IP southeast

(_ decrement the input cell and redirect the IP northeast

}*)! move the MP to the cell to the right, set that cell to 1 and print that out

_> redirect the IP back east

*' irrelevant operation, then move the MP back to the input cell

this then loops back to the branch command